A 75 kg baseball player runs at a velocity of 6 m/s and sliding 2 m what is the force of friction that acts upon him?

Answers

Answer 1

Answer:

1350N

Explanation:

Given data

mass= 75kg

velocity= 6m/s

distance= 2m

The expression for the applied force is given as

F= mv^2/d

Substitute

F= 75*(6)^2/ 2

F= 75*36/2

F= 2700/2

F= 1350N

Hence the force is 1350N


Related Questions

2. A 2.0 kg block rests on a level surface. The coefficient of static friction is µ[s] = 0.60 , and the coefficient of kinetic friction is µ[k] = 0.40 , A horizontal force, X, is applied to the block. As X is increased, the block begins moving. Describe how the force of friction varies as X increases from the moment the block is at rest to when it begins moving. Indicate how you could determine the force of friction at each value of X―before the block starts moving, at the point it starts moving, and after it is moving. Show your work.

Answers

(a) The force of friction increases as the applied force increases.

(b) The force of friction at each value of X (applied force ) can determined by subtracting the net force on the block from the  applied force.

What is coefficient of static friction?

The coefficient of static friction is the ratio of the maximum static friction force between the surfaces in contact before movement commences to the normal force.

Mathematically, the coefficient of static friction is given as;

μ = F/N

where;

μ is the coefficient of static frictionN is the normal force F is the static frictional force

Before the block start moving, the static friction must be overcame since it prevents the block from moving.

The net force on the block is determined by applying Newton's second law of motion.

F - Ff = ma

F = ma + Ff

where;

F is the applied forceFf is the force of friction

From the formula above, as the applied force increases the force of friction increases as well.

The force of friction at each value of X (applied force ) is calculated as follows;

Ff = F - ma

Ff = F - F(net)

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the water enters the pipe with an inside diameter d=2.68cm and rises to a maximum height h=2.54m above the pump. what is the pressure, in pascals, at the maximum height? (neglect frictional losses.)

Answers

The density of water is approximately 1000 kg/m³, and the acceleration due to gravity is approximately 9.8 m/s².

P = 1000 kg/m³ * 9.8 m/s² * 2.54 m

To determine the pressure at the maximum height, we can use the principle of hydrostatic pressure. This principle states that the pressure in a fluid at any given depth is directly proportional to the density of the fluid, the acceleration due to gravity, and the depth.

First, we need to convert the inside diameter of the pipe to meters. Given that d = 2.68 cm = 0.0268 m.

Next, we can calculate the pressure at the maximum height using the equation:

P = ρ * g * h

where P is the pressure, ρ is the density of the fluid, g is the acceleration due to gravity, and h is the height.

The density of water is approximately 1000 kg/m³, and the acceleration due to gravity is approximately 9.8 m/s².

Substituting the values into the equation:

P = 1000 kg/m³ * 9.8 m/s² * 2.54 m

Calculating the expression will give us the pressure P in pascals (Pa).

Note: Make sure to use the correct units and double-check the values used in the calculation for accuracy.

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Which of the following will cause the degeneracy pressure within an object to increase?
A. raising its temperature
B. shining a light on it, which adds radiative energy
C. lowering its temperature
D. letting it expand to lower density
E. compressing it to higher density

Answers

Option E. Compressing it to a higher density will cause the degeneracy pressure within an object to increase.

Degeneracy pressure is the pressure exerted by the fermions (such as electrons or neutrons) in an object when they are forced into a small volume due to quantum mechanical effects. This pressure arises due to the Pauli Exclusion Principle, which states that no two fermions can occupy the same quantum state simultaneously.

As a result, the fermions in the object will occupy higher and higher energy levels as they are compressed into a smaller volume, creating an outward pressure that resists further compression. Therefore, compressing an object to a higher density will cause the fermions within it to occupy higher energy levels, leading to an increase in degeneracy pressure.

Letting the object expand to lower density, will actually decrease the degeneracy pressure since the fermions will have more room to spread out and occupy lower energy levels. Overall, the degeneracy pressure is an important factor in determining the structure and stability of objects such as white dwarfs, neutron stars, and even atomic nuclei. Therefore, the correct answer is option E.

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Creative Writing: Write a journal entry assuming the identity of a colonial
settler starting a new life in one of the three regions. What do you like about the
region? What are your struggles? What economic opportunities have you found?

Answers

The complete journal entry have been shown in the writing that is below here.

How do you write the journal entry?

Dear Journal,

I am a colonial settler who has recently arrived in the New World to start a new life in one of the three regions. After much consideration, I have chosen to settle in the Southern colonies. The warm climate and fertile soil are perfect for growing crops such as tobacco, cotton, and indigo. I also appreciate the coastal location, which provides easy access to trade and transportation.

However, life as a colonial settler is not without its struggles. For one, the threat of disease and illness is always present, and the lack of medical resources can be concerning. Additionally, I am constantly wary of attacks from Native American tribes who view us as invaders. Nevertheless, I am determined to make the best of this opportunity and establish a successful life in the New World.

On a more positive note, I have found a number of economic opportunities in the Southern colonies. The growth of the tobacco industry has been particularly promising, and I have already begun planting crops in hopes of a bountiful harvest. I have also established relationships with other settlers and traders, and I am confident that my business ventures will continue to expand.

Overall, I am excited for this new chapter of my life and grateful for the opportunities that the Southern colonies have presented. While there will undoubtedly be challenges along the way, I am determined to make a successful life for myself and my family in this promising new land.

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A meter stick is found to balance at the 49.7-cm mark when placed on a fulcrum. When a 41.5-gram mass is attached at the 28.5-cm mark, the fulcrum must be moved to the 39.2-cm mark for balance. What is the mass of the meter stick

Answers

Answer:

The value is  \(M = 42.3 \ kg\)

Explanation:

From the question we are told that

    The first  position of the fulcrum  is  x = 49.7 cm

    The mass  attached is \(m = 41.5 \ g\)

    The position of the attachment is  \(x_1 = 28.5 \ cm\)  

    The second position of the fulcrum is  \(x_2 = 39.2 \ cm\)

Generally the sum of clockwise torque =  sum of anti - clockwise torque

So  

       \(CWT = m (x_2 - x_1)\)

Here CWT  stands for clockwise torque

       \(ACWT = M ( x - x_2)\)

So

      \(m (x_2 - x_1) = M ( x - x_2)\)

=>   \(41.5 (39.2 - 28.5 ) = M ( 49.7 -39.2 )\)

=>    \(M = 42.3 \ kg\)

What does a filled-in circle mean on a pedigree?

Answers

The circle of the family tree symbol represents a female individual. Individuals are the main component of a family tree chart.

A pedigree chart is a graph showing the prevalence and incidence of a particular gene or organism and its ancestors from one generation to the next (most commonly humans, show dogs, and horses race). The Family Tree presents family information in an easy-to-read chart. We could simply call it a "family tree". The genealogy uses a standardized set of symbols, with squares representing males and circles representing females. Building the family tree is the story of the family, and as memories fade, details about previous generations can become uncertain.

Diamonds are used if the gender of the person is unknown. Individuals with associated phenotypes are indicated by solid (dark) symbols. Heterozygotes, when identifiable, are indicated by shaded dots in symbols or half-filled symbols.

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a 65- kg person is skiing down a hill. the skier’s speed at the bottom is 15 m/s. if the skier hits a snowdrift and stops in 0.30 s, (a) how far does she go into the drift? (b) with whay average force will she strike the drift?

Answers

If the skier hits a snowdrift and stops in 0.30 s, She would go into the drift to 2.25 m. The average force that she will strike the drift is 3250 N.

What is speed?

The speed at which an object's location changes in any direction. The distance traveled in relation to the time it took to travel that distance is how speed is defined.

a = -15 / 0.3 = -50 m/s2

v2 - v02 = 2ax

- 152(-50)x == > x = 2.25 m

F = ma = 65 x 50 = 3250 N

Therefore, a. She would go into the drift to 2.25 m.

b. The average force that she will strike the drift is 3250 N.

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As of 2018, how many space probes had flown past Uranus closely enough to take detailed pictures?

Answers

As of my knowledge cutoff in September 2021, no space probes have flown past Uranus closely enough to take detailed pictures.

The only spacecraft that has ever visited Uranus is Voyager 2, which conducted a flyby of the planet in 1986. During the flyby, Voyager 2 captured images and collected data, providing valuable information about the planet and its moons. However, the images obtained were not at a level of detail considered "detailed pictures" by today's standards. It's important to note that my information is accurate up until September 2021, and there may have been new missions or developments since then. For the most up-to-date information, it is recommended to refer to reliable sources or official space agency announcements.

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The classic Millikan oil drop experiment was the first to obtain an accurate measurement of the charge on an electron. In it, oil drops were suspended against the gravitational force by a vertical electric fielda. Given that the oil drop is 0.95 μm in radius and has a density of 905 kg/m3, find the weight of the drop in N.b. If the drop has a single excess electron, find the electric field strength needed to balance its weight.

Answers

After solving, a) The weight of it oil drop is 2.42 x 10⁻¹² N, b) the electric field strength needed to balance its weight is -1.51 x 10⁷ N/C

The weight of the oil drop can be calculated using the formula:

weight = mass x gravity

where mass = density x volume and gravity = 9.81 m/s².

The volume of the oil drop can be calculated using the formula for the volume of a sphere:

volume = (4/3) x pi x radius³

Substituting the given values:

volume = (4/3) x pi x (0.95 x 10⁻⁶ m)³ = 2.73 x 10⁻¹⁶ m³

mass = density x volume = 905 kg/m³ x 2.73 x 10⁻¹⁶ m³ = 2.47 x 10⁻¹³ kg

weight = mass x gravity = 2.47 x 10⁻¹³ kg x 9.81 m/s² = 2.42 x 10⁻¹² N

To balance the weight of the oil drop, the electric force on the excess electron must be equal and opposite to the weight of the drop. The electric force on the excess electron can be calculated using the formula:

electric force = charge x electric field

where charge is the charge on the excess electron and electric field is the strength of the electric field.

The charge on an electron is -1.602 x 10⁻¹⁹ C.

Substituting the given values and equating the electric force to the weight of the drop:

charge x electric field = weight

-1.602 x 10⁻¹⁹ C x electric field = 2.42 x 10⁻¹² N

Solving for electric field:

electric field = (2.42 x 10⁻¹² N) / (-1.602 x 10⁻¹⁹ C) = -1.51 x 10⁷ N/C

The negative sign indicates that the electric field is directed upward, opposite to the direction of gravity, in order to balance the weight of the drop.

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What volume of water has the same mass as 8.0 m3 of ethyl alcohol?b. If this volume of water is in a cubic tank, what is the pressure at the bottom?
a) Volume is 6.312 m3
b) Pressure is 18 kPa

Answers

The volume of the water is  6.312  m³.

The pressure at the bottom is 18 kPa.

What is density?

The substance's mass per unit of volume is known as its density (volumetric mass density or specific mass). Although the Latin letter D may also be used, the sign most frequently used for density is ρ   (the lower case Greek letter rho).

The volume of the water is = {(8.0)/density of ethyl alcohol} × density of water

= 6.312  m³

If this volume of water is in a cubic tank, the pressure at the bottom =

∛(6.312)  × 9.8 × 1000 Pa

= 18 kPa.

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how are atoms in a molecule held together?

A.through shared protons

B.through shared electrons

C.through shared neutrons

D.through shared energy

Answers

Atoms held together through shared electrons.

A molecule is composed of atoms. Atoms are the smallest particles of a substance which can take part in a chemical reaction. Atoms are composed of electrons and the electrons in the outermost shell of atoms help bond atoms together in a molecule.

Hence, atoms are held together in molecules by electrons so they are held together through shared electrons.

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You have just jumped into the ocean after your boat began to sink. Luckily, you found an air tank before you jumped. Unluckily, the air tank has been used. The gauge says there is now exactly 30,000ml of air left in the tank. In a panic, you take in the full inspiratory reserve volume each time you inhale. How many times can you inspire at this panicked volume before the tank runs out?

Answers

With 30,000ml of air left in a used tank, taking in full inspiratory reserve volume with panic breaths, one can inhale around 20 times before the air runs out.

You can breathe normally 20 times until the air runs out after diving into the water, discovering a used air tank with 30,000 ml of air left, and panicking while inhaling the entire inspiratory reserve volume with each breath. The quantity of air that can be breathed more than the tidal volume is known as the inspiratory reserve volume. An adult in good health has an average inspiratory reserve capacity of about 3,000 ml.

As a result, you may take about 10 complete breaths with 30,000 ml of air still in the tank, multiplied by 3,000 ml for every breath. The inspiratory reserve capacity is expected to rise during panic breathing, leading to smaller breaths and more frequent inhalations, allowing for about 20 breaths. In a survival crisis, it's critical to maintain composure and save air.

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bioprocessing
1. Validation is not needed for single-use systems in a
bioreactor. Would you agree with this statement? Explain your
answer.

Answers

In general, the statement that validation is not needed for single-use systems in a bioreactor is not accurate. Validation is an essential process in bioprocessing that ensures the reliability, consistency, and safety of the manufacturing process. Single-use systems, which are increasingly used in bioreactors, can introduce unique challenges and considerations.

Validation of single-use systems involves assessing their performance, integrity, and compatibility with the process requirements. Factors such as material integrity, sterile connections, and proper functioning of sensors and control systems should be evaluated to ensure the system's suitability for use.

While single-use systems offer advantages in terms of cost, flexibility, and minimizing cross-contamination risks, they still require validation to demonstrate their reliability and performance. It is essential to follow industry standards, regulatory guidelines, and good manufacturing practices to ensure the quality and safety of bioprocessing operations, regardless of the system being used.

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let you are running at 15 meter/sec and declerates at 4 meter/sec square
a. how long will you have take to stop
b. how far will you go while declerating

Answers

Answer:

a. 3.75 s b. 28.125 m

Explanation:

Data

Vi = 15 m/s

Vf = 0 m/s

a = -4 m/s²

i) t = ?

ii) S = ?

Solution

i) Using Newton's 1st Eq of Motion

Vf = Vi + at

t = (Vf - Vi) / a

t = (0 - 15) / -4

t = 3.75 s

ii) Using Newton's 3rd Eq of Motion

2aS = Vf² - Vi²

S = (Vf² - Vi²) / 2a

S = (0² - 15²) / 2 x -4

S = 28.125 m

why does a person fall to the floor when he or she trips over a heavy box?

*Newton’s Laws*

Answers

Answer:

Friction (traction) is the resistance between things. There's friction between your shoes and the ground. Without enough friction, you can slip and fall.

When you push a heavy box, it pushes back at you with an equal and opposite force (Third Law) so that the harder the force of your action, the greater the force of reaction until you apply a force great enough to cause the box to begin sliding.

When a person trips over a heavy box and falls to the floor, it's due to a combination of factors related to the laws of physics. Here's what happens:

1. Inertia: Every object tends to remain at rest or in uniform motion unless acted upon by an external force. This is Newton's first law of motion. When you're walking and suddenly trip over a heavy box, your body's forward motion is abruptly interrupted by the box. Your lower body and legs might still have forward momentum, causing you to stumble or fall.

2. Force of Gravity:The heavy box you trip over exerts a force of gravity on your body. When you collide with the box, this force pulls you downward, accelerating your fall towards the ground.

3. Friction and Contact Forces: When you trip over the box, there are contact forces and frictional forces involved. Your foot might get caught on the box, and the friction between your foot and the surface of the box can cause your body to tilt forward. As a result, you lose your balance.

4. Center of Mass: Your body's center of mass is the point around which your weight is evenly distributed. When you trip and lose your balance, your center of mass might shift outside your base of support (your feet), causing you to tip over and fall.

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You get a job delivering water. You calculate how much work is done picking up each 20 L bottle of
water and raising it vertically 1 m. For every 100 bottles you deliver, you will use Select.... (g =
9.8 m/s2)
-196J
-2,000 J
-19,600 J
-196,000J

Answers

Answer:

The work done by picking up 100 20-L bottles and raising it vertically 1 meter is 19614 joules.

Explanation:

By the Work-Energy Theorem, the work needed to raise vertically 100 bottles of water is equal to the gravitational potential energy, units for work and energy are in joules:

\(\Delta W = \Delta U_{g}\) (1)

Where:

\(\Delta W\) - Work.

\(\Delta U_{g}\) - Gravitational potential energy.

The work is equal to the following formula:

\(\Delta W = n\cdot \rho \cdot V \cdot g \cdot \Delta h\) (2)

Where:

\(n\) - Number of bottles, dimensionless.

\(\rho\) - Density of water, measured in kilograms per cubic meter.

\(V\) - Volume, measured in cubic meters.

\(g\) - Gravitational acceleration, measured in meters per square second.

\(\Delta h\) - Vertical displacement, measured in meters.

If we know that \(n = 100\), \(\rho = 1000\,\frac{kg}{m^{3}}\), \(V = 0.02\,m^{3}\), \(g = 9.807\,\frac{m}{s^{2}}\) and \(\Delta h = 1\,m\), then the work done is:

\(\Delta W = (100)\cdot \left(1000\,\frac{kg}{m^{3}} \right)\cdot (0.02\,m^{3})\cdot \left(9.807\,\frac{m}{s^{2}} \right)\cdot (1\,m)\)

\(\Delta W = 19614\,J\)

The work done by picking up 100 20-L bottles and raising it vertically 1 meter is 19614 joules.

HELP ME ANSWER THIS FOR 96 POINTS PLEASE!!

The three modified Atwood's machines shown below have blocks of mass M on a frictionless surface
and hanging from a string. When the blocks are released, they accelerate.

Rank them from smallest to largest and explain why in a short paragraph using the mass terms and force.

HELP ME ANSWER THIS FOR 96 POINTS PLEASE!!The three modified Atwood's machines shown below have blocks

Answers

Answer:

Smallest - B

Largest - C

Middle - A

The hanging mass provides the force for accelerating the system.

In case A the force M G accelerates 2 * M

So you have for F = M a     M * g = 2 * M * a    or  a = g / 2

In case B  F = M a         M * g = 3 * M * a        and a = g / 3

In case C   F = 2 * M * g      2 M * g = 3 * M * a      and a = 2 * g / 3      

Rank from smallest to largest force Smallest - B, Middle - A, Largest - C.

What is force?

A force is an effect that can alter an object's motion according to physics. An object with mass can change its velocity, or accelerate, as a result of a force. An obvious way to describe force is as a push or a pull. A force is a vector quantity since it has both magnitude and direction.

Smallest - B

Largest - C

Middle - A

The hanging mass provides the force for accelerating the system.

In case A the force M G accelerates 2 * M

So you have for F = M a     M * g = 2 * M * a    or  a = g / 2

In case B  F = M a         M * g = 3 * M * a        and a = g / 3

In case C   F = 2 * M * g      2 M * g = 3 * M * a      and a = 2 * g / 3  

Rank from smallest to largest force Smallest - B, Middle - A, Largest - C.

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How does temperature change from planets to planets in our solar system?

Answers

The further a planet is from the Sun, the colder its surface temperatures tend to be. Venus is an exception, since it has the highest surface temperature in our solar system due to its close closeness to the Sun and its thick atmosphere.

What was the temperature of the solar system when the planets first formed?

The inner planets are rocky, whereas the outer planets are gaseous, which can be attributed to the early solar system's temperature. The solar system's temperature increased as the gases came together to create a protosun. Temperatures in the inner solar system reached 2000 K, whilst in the outer solar system, it was only 50 K.

The quantity of heat received is just one of many intricate aspects that go into determining the temperature.

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A device (or a "system") undergoes a process whereby its internal energy, U, changes by 30 kJ while it loses heat to its suroundings by the amount of 29 kJ. Estimate how much work was done on or by this device, in joule (J). Note the work done by the system (> 0) is indicated with a positive sign, while work done on the system (< 0) is indicated by a negative sign, and therefore the sign before your numerical answer will indicate whether the work was done BY the system on ON the system. Also note that 1 kJ = 1000 J.

Answers

The drag force acting on a submarine is determined by the density of the water, the square of the velocity, the reference area, and the drag coefficient.

The drag force, Fa, acting on a submarine is influenced by several factors, including the characteristic length, L, the velocity, V, and the viscosity and density of the water. The relationship between these variables can be described by the drag equation, which states that the drag force is proportional to the density of the fluid, the square of the velocity, the reference area, and a dimensionless coefficient known as the drag coefficient.

The relation between the drag force, Fa, and the variables can be expressed using the drag equation:

Fa = 0.5 * ρ * V^2 * A * Cd

Where:

Fa is the drag force

ρ (rho) is the density of the water

V is the velocity of the submarine

A is the reference area of the submarine

Cd is the drag coefficient

The drag coefficient, Cd, accounts for the shape and surface characteristics of the submarine and is dependent on the flow conditions. It is determined through experimental testing or computational simulations.

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A solid metal bar is at rest on a horizontal frictionless surface. It is free to rotate about a vertical axis at the left end. The figures below show forces of different magnitudes that are exerted on the bar at different locations. In which case does the bar’s angular speed about the axis increase at the fastest rate?.

Answers

The case where the angular speed of the bar will increase at a fast rate is at smaller radius compared to the initial radius from the center of rotation.

Conservation of angular momentum

The principle of conservation of angular momentum states that the total angular momentum of a closed system is always conserved.

\(I_i \omega _i = I_f \omega _f\)

where;

Ii is initial moment of inertia of the solid sphereIf is the final moment of inertia of the solid sphereωi is the initial angular speed ωf is the final angular speed

\(\omega _f = \frac{I_i \omega _i }{I_f} \\\\\omega_f = \frac{(1/2MR_i^2)\omega _i}{1/2 MR_f^2}\\\\\omega _f = \frac{R_i^2 \omega _i}{R_f^2}\)

where;

M is mass of the barR is radius

The angular speed of the bar depends of the moment of inertia of the bar which in turn depends on axis of rotation.

Thus, the case where the angular speed of the bar will increase at a fast rate is at smaller radius compared to the initial radius from the center of rotation.

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according to the hubble classification scheme, an sc galaxy has group of answer choices a large central bulge and tightly wound spiral arms. a small central bulge with tightly wound spiral arms a round or spherical appearance with a smooth light distribution. a large central bulge with loosely wound spiral arms a small central bulge and loosely wound spiral arms.

Answers

"According to the Hubble classification scheme, an sc galaxy has a small central bulge and loosely wound spiral arms." Correct option is D.

Galaxies were first categorised by Edwin Hubble into four categories: spirals, barred spirals, ellipticals, and irregulars. He further distinguished between spiral and barred spiral galaxies based on the size of the central bulge and the structure of the arms.

In the vast expanse of the cosmos, a galaxy is a collection of stars, interstellar gases, dust, and rock.

These galaxies were categorised by Hubble as SB galaxies with subclasses a, b, and c. They resemble spirals in general. In barred spirals, the spiral arms don't truly start there, but they do seem to.

A type Sa galaxy (Spiral a) features tightly wound arms and a noticeable bulge. The spiral c galaxy of type Sc features a tiny bulge and pronounced arms.

Sc spirals, in comparison, have a gas and dust content of 15%, which indicates that a sizable amount of the galaxy's mass is devoted to star formation. Because of this, Sc galaxies are characterised by tiny bulges and loosely wrapped arms that are frequently resolved into star clusters and HII areas. Best choice is D.

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categorize we evaluate the current with an equation developed in this section, so we categorize this example as a substitution correct: your answer is correct. problem. combine imax

Answers

Example categorized as correct substitution problem using equation from section to evaluate current.

This means that the given problem involves replacing variables in an equation with given values and solving for the unknown variable. The solution obtained using this method is deemed correct according to the equation developed in the section. The use of equations in problem-solving is a common practice in various fields, including mathematics, physics, and engineering. By categorizing problems, it becomes easier to identify the appropriate methods to use in solving them, which can improve problem-solving efficiency and accuracy. Example categorized as correct substitution problem using equation from section to evaluate current. Imax is the maximum current and the answer obtained is deemed correct according to the equation developed in the section.

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The radius of a white dwarf is determined by a balance between the inward force of gravity and the outward push of.

Answers

The radius of a white dwarf is determined by a balance between the inward force of gravity and the outward push of electron degeneracy pressure.

How does electron degeneracy pressure work?

No two electrons with the same spin may occupy the same energy level in the same volume, according to the Pauli exclusion principle. The other electrons are forced into higher and higher energy states as soon as the lowest energy level is occupied, which causes them to move at ever faster rates. These quickly moving electrons create an electron degeneracy pressure strong enough to host a star. The Chandrasekhar limit (the highest mass a white dwarf may achieve) develops naturally as a result of the physics of electron degeneracy, and electron degeneracy pressure in particular is what supports white dwarfs in addition to gravitational collapse.

As a white dwarf's mass approaches the Chandrasekhar limit, gravity works to compress the star into a smaller space, which forces electrons to move through higher energy states and at higher speeds. At the Chandrasekhar limit, the star can no longer be sustained by the pressure of electrons moving at almost light speed, and the white dwarf collapses into a considerably denser state.

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Question 3
A mover pushes a box with 400N a distance of 3m in 55s.
a -Calculate the work:
b- Calculate the Power

Answers

Answer:

1200J

21.8Watts

Explanation:

Given parameters:

Force  = 400N

Distance  = 3m

Time  = 55s

Unknown:

Work done  = ?

Power  = ?

Solution:

Work done is the force applied to move a body through a certain distance.

Power is the rate at which work is done

 Work done  = Force x distance  = 400 x 3 = 1200J

Power  = \(\frac{work done }{time}\)   = \(\frac{1200}{55}\)    = 21.8Watts

What is the formula for total resistance RT in parallel circuit having resistor R1 and R2?

Answers

The formula for the total resistance \((\(R_T\))\) in a parallel circuit with resistors \(\(R_1\)\) and \(\(R_2\)\) is given by the expression: \(\[\frac{1}{R_T} = \frac{1}{R_1} + \frac{1}{R_2}\]\)

In this formula, the reciprocals of the individual resistances are added together and then inverted to obtain the total resistance. This formula can be generalized for more than two resistors connected in parallel by adding the reciprocals of all the individual resistances.

To understand the formula, let's consider a parallel circuit where \(\(R_1\)\) and \(\(R_2\)\) are connected in parallel to a voltage source. In a parallel configuration, each resistor has the same voltage across it. The total current entering the parallel circuit divides between the resistors, creating separate current paths. According to Ohm's law, the current through each resistor is inversely proportional to its resistance. The total resistance in a parallel circuit is determined by the reciprocal sum of the individual resistances since the total current is divided among the different paths. The formula accounts for this behavior by adding the reciprocals of the resistances.

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Ella rode her bike 5 miles in 30 minutes. What was Ella's average speed in miles per hour? (pls helppp!)

Answers

10miles bc 30minsx2 is 60 or one hour so 5miles x 2 is 10 miles

Answer:

6 minutes per mile

According to newton's second law, if you double the force acting on a body, the acceleration will double.
a. true
b. false

Answers

It is the true statement, that if we double the force acting on a body, the acceleration will double.

What is acceleration?

In terms of both speed and direction, acceleration is the rate at which velocity varies over time. Acceleration refers to the change in speed or direction of an item or point travelling straight forward. Due to the constant change in direction, motion on a circle accelerates even while the speed is constant. Both impacts help to accelerate all other types of motion.

In order to be a vector quantity, acceleration must have both a magnitude and a direction. As a vector quantity, velocity is also. A time interval's velocity vector change divided by that interval's duration is the definition of acceleration.

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I need help for 2 ASAP I haven’t been able to figure it out :(

I need help for 2 ASAP I havent been able to figure it out :(

Answers

a. 50 * Cos (60)
b. 50 * Sin (60)

The volume per second of a fluid flowing through a horizontal pipe of length l is given by kpa/n where k is constant, p is the excess pressure (force per unit area) a is the radius of the pipe and U is the frictional quantity of dimension MLT-1 by dimensions find the number x

Answers

According to the given statement the number x is 2. The number x represents the dimensions of the term p * a in the given equation.

By comparing the dimensions of both sides of the equation, we find that x is equal to 2.

The equation given is:

Volume per second = k * (p * a) / n

Where:
- k is a constant
- p is the excess pressure (force per unit area)
- a is the radius of the pipe
- n is the frictional quantity of dimension MLT⁻¹


To find the number x, we need to determine the dimensions of each term in the equation.

1. Dimension of Volume per second:


  - Volume has the dimension L³ (length cubed)
  - Time has the dimension T (time)
  - Therefore, Volume per second has the dimension L³  / T

2. Dimension of k:


  - The equation states that k is a constant. Constants are dimensionless.

3. Dimension of p * a:


  - Pressure has the dimension M / (L * T² ) (mass divided by length and time squared)
  - Radius has the dimension L (length)
  - Multiplying pressure by radius results in the dimension M / (L * T² ) * L = M / (L²  * T² )

4. Dimension of n:


  - Given in the question, n has the dimension MLT⁻¹
(mass times length times time to the power of -1)

Now, we can equate the dimensions:

L³  / T = k * (M / (L²  * T² )) * MLT⁻¹


Simplifying the dimensions:

L³  / T = k * M / (L²  * T² ) * MLT⁻¹


L³  / T = k * M / L²  * M / T²  * L^-1 * T⁻¹


L³  / T = k * M²  / L²  * T⁻¹


To equate the dimensions, both sides of the equation must have the same dimensions. Therefore:

L³ / T = k * M² / L² * T⁻¹


Comparing the dimensions on both sides, we can conclude:

L³ / T = k * M² / L²* T⁻¹

The dimensions on the left side are L^3 / T, and the dimensions on the right side are (k * M²) / (L² * T).

Therefore, the number x is 2.

The number x represents the dimensions of the term p * a in the given equation.

By comparing the dimensions of both sides of the equation, we find that x is equal to 2.

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Since monsoons are storms that usually occur during a specific time of year in certain regions, you could not compare them to thunderstorms.
true
false

Answers

Since monsoons are storms that usually occur during a specific time of year in certain regions, you could not compare them to thunderstorms this statement is false.

What is thunderstorms?

Thunderstorms are powerful storm systems that are characterized by the presence of lightning, strong winds, heavy rain, and often thunder. They typically occur in warmer climates and can last anywhere from a few minutes to several hours. Thunderstorms can cause damage to property, disrupt power, and even cause flash flooding. Although they are dangerous, thunderstorms often bring much needed rain to areas that are in need of it.

Thunderstorms usually occur in a much more unpredictable manner, meaning they can happen in any region, typically during the spring and summer months.

Monsoons are characterized by a marked change of wind direction and a major increase in precipitation that occurs for a few months at a time. They are popular in South Asian countries such as India, Pakistan, and Bangladesh, and have been known to cause severe floods due to the large amounts of precipitation they bring. Monsoons are caused by the differences in the air pressure between two regions, the Indian Ocean and the continent of Asia.

Thunderstorms, on the other hand, are usually caused when hot and cold air masses interact in the atmosphere. They often occur during the spring and summer months, and are usually associated with heavy rainfall, thunder and lightning, and gusty winds. Thunderstorms usually form quickly and last for only a few hours before dissipating.

The main difference between monsoons and thunderstorms is the frequency and predictability of the storms. Monsoons occur during a specific time of year and in certain regions, while thunderstorms occur in a much more unpredictable manner. Monsoons are also typically much more intense than thunderstorms, and can cause much more destruction.

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