one force of 6.2 newtons and one force of 4.4 newtons act on a body at the same point so that the resultant force is 9.1 newtons. find the angle between the resultant and the larger force, to the nearest 10th of a degree.

If the magnetic polarity of the north pole of the Sun at a particular time is north, the polarity of the preceding sunspot region rotating about the Sun in the northern hemisphere will be north.

Sunspots are regions of the Sun where the magnetic field is significantly stronger than anyplace else, at a rate of around 2,500 times that of Earth.

Since there is a strong magnetic field, the magnetic pressure rises while the air pressure lowers around it.

Since they develop in places with exceptionally strong magnetic fields, sunspots are comparatively cooler. Because of how powerful these magnetic fields are, part of the Sun's heat is prevented from reaching the Earth.

It has been discovered that the magnetic field of a sunspot is made up of the Sun's magnetic field that has been twisted or tangled.

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Answer:

Option 3. The tennis ball began from rest and rolls at a rate of 14.7 m/s safer 1.5 seconds.

Explanation:

To know the the correct answer to the question, it is important that we know the definition of acceleration.

Acceleration can simply be defined as the rate of change of velocity with time. Mathematically, it is expressed as:

a = (v – u) /t

Where

a => acceleration

v => final velocity

u => Initial velocity

t => time

With the above information in mind, let us consider the options given in the question above to know which conform to the difinition of acceleration.

For Option 1,

We were told that the tennis ball has the following:

Distance = 4 m

Time = 1.5 s

This talks about the speed and not the acceleration.

Speed = distance / time

For Option 2,

We were only told about the average speed and nothing else.

For Option 3,

We were told that the tennis ball have the following:

Initial velocity (u) = 0 m/s

Final velocity (v) = 14.7 m/s

Time = 1.5 s

This talks about the acceleration.

a = (v – u) /t

For Option 4,

We were only told that the tennis rolls to the right at an average speed. This talks about the average velocity. We need more information like time to justify the acceleration.

From the above illustrations, option 3 gives the correct answer to the question.

The velocity of the cannonball along the x axis after 7.59 s is therefore:vx = (150 m/s)(cos 0°)(7.59 s)vx = 1139.85 m.(d) Dimensionless velocity and dimensionless time are given by:v' = v/vTt' = 2gh/ vT²These expressions simplify the solution to part (c).

(a)  Terminal velocity along y axis is the maximum velocity that the cannonball can reach along y-axis as it falls. When it reaches terminal velocity, the acceleration of the cannonball becomes zero since its weight is balanced by air resistance. According to Stoke’s law, the drag force (Fd) experienced by a sphere moving slowly in a fluid is given by: Fd = 6πηrvwhere:η is the kinematic viscosity of the fluidv is the speed of the sphere, andr is the radius of the sphereHence, the terminal velocity (vT) of the cannonball is given by:  mg = 4/3 πr³ρg   [weight of cannonball = volume of cannonball x density of cannonball x acceleration due to gravity]6πηrvT = mgvT = mg/ (6πηr)The velocity of the cannonball along the y-axis is zero at the start and it reaches terminal velocity after falling through some height h.The velocity of the cannonball at any time t is given by:v = (2gh/ 3πr² ρ)½The velocity of the cannonball along the y axis is 131.3 m/s.(b)At 95% of terminal velocity, the velocity of the cannonball is 124.74 m/sUsing the expression:v = (2gh/ 3πr² ρ)½124.74 = (2gh/ 3πr² ρ)½h = (3/2)(124.74)² πr²ρ/g = 1509.65 mTherefore, it takes 7.59 s to reach 95% of the terminal velocity.(c)At the time determined in part (b), the velocity of the cannonball along the x axis can be calculated using the equation below:vx = vo xcosθtwhere vo is the initial velocity along the x-axis, θ is the angle of projection, and t is the time taken.At launch, the initial velocity along the x axis is 150 m/s and the angle of projection is 0°.

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Answer:

The image is formed at 0.44 m in front of the mirror

magnification (M) = 0.44

Explanation:

Applying, mirror formular

1/f = (1/u)+(1/v).................... Equation 1

Where f = Focal length of the convex mirror, u = object distance, v = image distance.

Using the real is positive convection,

From the question,

Given: f = -1.6/2 = -0.8 m( The focal length of a convex mirror is vitual), u = 1.0 m

Substitute these values into equation 1

-1/0.8 = (1/v)+(1/1)

Solve for v

1/v = 1.25+1

1/v = 2.25

v = 1/2.25

v = 0.44 m

Hence the image is formed at 0.44 m in front of the mirror

Magnification (M) = v/u

m = 0.44/1

m = 0.44

Answer:

he found that a single forece known as gravity keeps the planets in their orbits around the sun gravity force that keeps planets in their orbits calculus a branch of mathmatics partially developed by Newton and used to explain his laws

Explanation:

I hope you have a nice day and please mark me(:

The statement "serving size is based on the amount of food that is customarily eaten at one time" is true.

Serving sizes are designed to represent the typical portion of a food item that an individual would consume in a single sitting. These sizes are often standardized across various types of food products to provide consumers with a consistent and reliable means of understanding and comparing the nutritional content of the items they consume.

To explain this further, serving sizes are determined by regulatory agencies and are based on average consumption data. They serve as a basis for the nutritional information presented on food labels, helping people to better understand how the food they eat contributes to their daily nutritional intake. This information is essential for making informed choices about the foods they consume and maintaining a healthy and balanced diet.

In conclusion, serving sizes provide an essential reference point for individuals to assess the nutritional content of their meals and make informed decisions about their dietary habits. By basing serving sizes on the amount of food that is customarily eaten at one time, these measurements offer a practical and accurate way for consumers to understand the impact of their food choices on their overall health and well-being.

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Answer:

The molecular structure of photovoltaic cells is important for their efficiency because it affects the ability of the cells to absorb and convert light into electricity. The photovoltaic effect, which is the basis of solar cell operation, occurs when photons of light excite electrons within the cell material, causing them to become free from their atomic bonds and creating an electrical current.

The molecular structure of the photovoltaic cell material determines the electronic properties of the material, such as the bandgap energy and the electron mobility, which play a crucial role in the photovoltaic effect. The bandgap energy determines the minimum energy required to excite an electron, and the electron mobility determines how easily the electrons can move within the material.

If the molecular structure is poorly designed, the bandgap energy may be too low to effectively absorb the desired light, or the electron mobility may be too low to allow the electrons to move efficiently, both of which can lead to a reduction in efficiency. On the other hand, if the molecular structure is optimized, the photovoltaic cells can absorb light more effectively, the electrons can move more efficiently, and the overall efficiency of the cells can be improved.

Therefore, the molecular structure of photovoltaic cells is an important factor in determining their efficiency and is carefully considered by scientists and engineers in the design and development of new photovoltaic materials and technologies

Answer:

Gravity creates stars and planets by pulling together the material from which they are made.

Explanation: Thats the only thing i have im stuck on the tga quiz

Answer:

248 minutes

Explanation:

6200/25=248

This means there is 248 25s in 6200

which means it will take 248 minutes to travel through the river

Also here's a neat trick:

The units for speed is meters/minute

The units for distance is meters

Dividing distance by speed will cancel out the meters and leave only the speed.

Answer:

yes

Explanation:

All Motion is relative to a reference point. Object appears to move whether object moves, the reference point moves, or both move. is the distance traveled by an object over the period of time in which it moved. Ex - a racecar driver completes a three-mile lap in 60 seconds.

The statement "All Motion is relative to a reference point." is True.

An inertial frame of reference is a frame of reference in which the Newton's laws are valid. In this frame of reference, the objects do not accelerate without any external force. All frames of reference moving with constant velocity are considered stationary.

In a non-inertial frame of reference, the Newton's laws will not work. They are moving with an acceleration.

All Motion is relative to a reference point. Object appears to move, the reference point moves, or both move is the distance traveled by an object over the period of time..

Thus, the statement "All Motion is relative to a reference point." is True.

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If you had a sugar cube that was made of white dwarf matter, it would weigh about as much as an elephant.

White dwarfs are the smallest type of stars in the universe, and they have a density of around 100 million times greater than that of water. This means that if you took a sugar cube that was made entirely out of white dwarf matter and put it on your kitchen counter, it would weigh about as much as an elephant!

But don't worry—you're not going to find any white dwarfs at your local grocery store or restaurant. White dwarfs are formed when red giants collapse in on themselves after burning through their fuel. And if you did happen to find one, you'd need a really big countertop.

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Answer: no exact answer

=

Explanation:

If both masses double in size and their separation between them triples. 13..33 N will be the force between the masses.

Newton's law of gravity states that each particle having mass in the universe attracts each other particle with a force known as the gravitational force.

Gravitational force is proportional to the product of the masses of the two bodies and inversely proportional to the square of their distance.

Given data:

The gravitational force = 30 N

Mass 1 =m₁

Mass 2=m₂

Distance between charges = R

Condition given:

Mass 1 = 2m₁

Mass 2= 2m₂

Distance  between charges = 3R

\(\rm F = \frac{Gm_1m_2}{R^2}\)

Case 2;

\(\rm F'=\frac{G(2m_1)(2m_2)}{(3R)^2} \\\\ F'=\frac{4}{9} \frac{Gm_1m_2}{R^2} \\\\ F'=\frac{4}{9} F \\\\ F'=\frac{4}{9} \times 30 \\\\ F'=13.33 \ N\)

Hence, the forces between the masses will be 13..33 N.

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Answer:

F is the force applied to the object and d or "S" is the distance through which the force is applied

Step 1;

Given,

The mass of the person, m=57.0 kg

The radius of the track, R=42.7 m

The normal force acting on the person, N=995 N

Step 2:

The centripetal force required for the person is provided by the sum of the difference in the normal force and the weight of the person.

Thus the centripetal force on the person is given by,

Where v is the speed with which the car and the person are moving and g is the acceleration due to gravity.

On rearranging the above equation,

Step 3:

On substituting the known values in the above equation,

Thus the velocity of the car is 18.08 m/s

Answer:

0.000136kg/m3

Explanation:

13.6 / 1000 = 0.0136kg/cm3

0.0136 / 100 = 0.000136kg/m3

Explanation:

The centripetal force experienced by the towel is 55 N.

The given parameters;

The centripetal force experienced by the towel spinning along the walls of the drum is calculated as follows;

Fc = mrω²

where;

Fc is the centripetal force

ω is angular speed in rad/s

The angular speed in rad/s is calculate as;

\(\omega = \frac{200 \ rev}{\min} \times \frac{2\pi \ rad}{1 \ rev} \times \frac{1\min}{60 \ s} \\\\\omega = 20.95 \ rad/s\)

The centripetal force experienced by the towel is calculated as;

\(F_c = mr\omega ^2\\\\F_c = 0.25 \times 0.5 \times (20.95)^2\\\\F_c = 54.9 \ N \ \approx 55 \ N\)

Thus, the centripetal force experienced by the towel is 55 N.

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The sound pressure ratio ranges from 10,000 to 1,00,000. The decibel level ranges from 80 dB to 100 dB.

The meaning of sound pressure is the discrepancy between the actual pressure and average pressure at any given instant at any place in the field of a sound wave.

The intensity of a sound, expressed in decibels, is known as sound pressure level (SPL) (dB).

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The tire moves 2.47 meters when the weightlifter applies 210 J of work to it. Because, the work done by weightlifter on tire causes it to move a certain distance.

Amount of work done depends on force applied and distance moved, and can be calculated using the work formula: work = force x distance

Substituting the given value: distance = 210 J / 85 N. distance = 2.47 m. Tire moves 2.47 meters when the weightlifter applies 210 J of work to it. This problem involves relationship between work, force, and distance, which are important concepts in physics. Work is defined as the product of force and distance, and it represents energy transferred to an object by a force acting on it.

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a) The derivation of the differential equation is ΔT' = (1 - h/(ρcPu))ΔT + T' - T and is explained in the explanation part below. b) The appropriate boundary conditions are: At the tube entrance (x = 0), T = To. At the tube exit (x = L), the convective heat transfer condition is applied: -kA(dT/dx) = hA(T - T∞).

a) The following assumptions are made to develop the differential equation characterising the temperature distribution of the liquid in the downstream region:

ρc(uA)∂T/∂x + ρc(uA)(T - To)∂u/∂x = kA∂²T/∂x² - hA(T - T∞)

Dividing the above equation by ρcPAu and rearranging, we obtain:

ΔT' = (1 - h/(ρcPu))ΔT + T' - T

b) The boundary conditions are:

Thus, this can be concluded regarding the given scenario.

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Answer:

\(\lambda\) = 40 cm

Explanation:

given data

string length = 30 cm

solution

we take here equation of length that is

L = \(n \times \frac{1}{4} \lambda\)     ...............1

so

total length will be here

\(L = \frac{\lambda}{2} + \frac{\lambda}{4}\\\)

\(L = \frac{3 \lambda }{4}\)

so \(\lambda\)  will be

\(\lambda = \frac{4L}{3}\\\lambda = \frac{4\times 30}{3}\)

\(\lambda\) = 40 cm

Answer:

d

Explanation:

The torque (τ) can be calculated using the formula:

τ = r * F * sin(θ)

where r is the perpendicular distance from the point of rotation to the line of action of the force, F is the magnitude of the force, and θ is the angle between the line of action of the force and the direction from the point of rotation.

Since the force and the rod both lie in the plane of the page, we need to determine the angle θ between the line of action of the force and the direction from the point of rotation for each scenario. Additionally, we need to know the specific point about which the torque is being calculated.

If you can provide the description or details of the scenarios or the specific angles and points of interest, I will be able to assist you in calculating the torque accurately.

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Electromagnetic radiation is indeed emitted by accelerating charges.

The rate at which energy is emitted from an accelerating charge with charge q and acceleration a is given by the equation

dedt = (2/3)q^2a^2/4πε₀c^3,

where ε₀ is the permittivity of free space and c is the speed of light.

Electromagnetic radiation is a form of energy that propagates as both electrical and magnetic waves traveling in packets of energy called photons.

There is a spectrum of electromagnetic radiation with variable wavelengths and frequency, which in turn imparts different characteristics.

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Answer:

The difference between two consecutive resonance points is always ½ a wavelength apart.

Explanation:

In both open and closed pipe resonators, the resonance points are always 1/2λ apart. (The distance to the next antinode)

The wheel is composed of a 10-kg hoop stiffened by four thin spokes with negligible masses. A horizontal force of 40 N is applied to the wheel initially at rest.  The angular velocity of the wheel is 16/3 rad/s.

The given data are:

Mass of wheel, m = 10 kg

Applied force, F = 40 N

Distance moved, d = 3 m

The wheel is composed of a 10-kg hoop stiffened by four thin spokes with negligible masses. A horizontal force of 40 N is applied to the wheel initially at rest. The friction is sufficient to prevent slipping. Calculate the angular velocity of the wheel and its center has moved 3 m.The torque exerted by the force

F = r × F

Here, r = radius of the wheel

Let the radius of the wheel be R.

Then the torque exerted by the force F,

τ = R × Fτ = R × F = R × 40 N.m = 40R N.m

Inertia of the wheel is given by,

I = ½ mR² (for a hoop)

For a thin hoop, mass m is located at the rim of the wheel.

Hence, radius of gyration k = R

Hence,

I = mk²I = mR²I = 10 × R² (since m = 10 kg)

The torque causes an angular acceleration a, given by,

τ = Iαa = τ / Ia = (40R) / 10R²a = 4 / R rad/s²

The final angular velocity of the wheel,

ω = √2a(d/R)ω = √2a(d/R) = √2(4/R)×(3/R)ω = √24/R² rad/s

The velocity of the center of the wheel,

v = Rωv = Rω = R√24/R² = √24R m/s

When the center of the wheel has moved a distance of 3 m, v = 3 m/s

Hence, R = v / √24R = 3 / √24 m

The final angular velocity of the wheel,

ω = √24/R²ω = √24/(3/√24)² rad/sω = √24/(9/24)ω = √24 × 24/9 rad/sω = 16/3 rad/sT

herefore, the angular velocity of the wheel is 16/3 rad/s.

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Answer: Different types of fuels have varying compositions and release different amounts of pollutants when burned. Here are some common types of fuels and the pollutants associated with them:

Fossil Fuels:

a. Coal: When burned, coal releases pollutants such as carbon dioxide (CO2), sulfur dioxide (SO2), nitrogen oxides (NOx), and particulate matter (PM).

b. Petroleum (Oil): Burning petroleum-based fuels like gasoline and diesel produces CO2, SO2, NOx, volatile organic compounds (VOCs), and PM.

Natural Gas:

Natural gas, which primarily consists of methane (CH4), is considered a cleaner-burning fuel compared to coal and oil. It releases lower amounts of CO2, SO2, NOx, VOCs, and PM.

Biofuels:

Biofuels are derived from renewable sources such as plants and agricultural waste. Their environmental impact depends on the specific type of biofuel. For example:

a. Ethanol: Produced from crops like corn or sugarcane, burning ethanol emits CO2 but generally releases fewer pollutants than fossil fuels.

b. Biodiesel: Made from vegetable oils or animal fats, biodiesel produces lower levels of CO2, SO2, and PM compared to petroleum-based diesel.

Renewable Energy Sources:

Renewable energy sources like solar, wind, and hydropower do not produce pollutants during electricity generation. However, the manufacturing, installation, and maintenance of renewable energy infrastructure can have environmental impacts.

It's important to note that the environmental impact of a fuel also depends on factors such as combustion technology, fuel efficiency, and emission control measures. Additionally, advancements in clean technologies and the use of emission controls can help mitigate the environmental impact of burning fuels.