A force unit is defined as the product of a mass unit and a unit of

acceleration.


time.


velocity.

displacement.

Answer:

The box displacement after 6 seconds is 66 meters.

Explanation:

Let suppose that velocity given in statement represents the initial velocity of the box and, likewise, the box accelerates at constant rate. Then, the displacement of the object (\(\Delta s\)), in meters, can be determined by the following expression:

\(\Delta s = v_{o}\cdot t+\frac{1}{2}\cdot a\cdot t^{2}\) (1)

Where:

\(v_{o}\) - Initial velocity, in meters per second.

\(t\) - Time, in seconds.

\(a\) - Acceleration, in meters per square second.

If we know that \(v_{o} = 5\,\frac{m}{s}\), \(t = 6\,s\) and \(a = 2\,\frac{m}{s^{2}}\), then the box displacement after 6 seconds is:

\(\Delta s = 66\,m\)

The box displacement after 6 seconds is 66 meters.

The force that acting upon it to change its state is a ball's movement is able to stop because of an unbalanced force that affects the ball's motion. The unbalanced force is called friction.

In the term of physics, Friction generally can be defined as a type of force that limits motion between two surfaces that are in contact. causing the force to be unbalanced. Friction usually occurs between the grass and the ball.  Frictional force generally can be defined as the force that occurs as a result of the contact of two surfaces due to the displacement of one or both of these objects. There are several examples of friction, Examples of frictional forces such as Pencil and paper friction while writing.  

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Momentum's conservation:

m1 v1 + m2 v2 + m3 v3 = 0 (vectors)

X axis : m2 v2 + m3 v3x = 0

v3x = - m2 v2/m3

Y axis : m1 v1 + m3 v3y = 0

v3y = - m1 v1/m3

m3 = m - (m1 + m2) = 1.92*10^-26 - (5.02 + 8.5)*10^-27 = 5.68*10^-27 kg

So :

v3x = - 5.98*10^6 m/s ;

v3y = - 5.30*10^6 m/s

(a) The vector v3 = - (5.98 i + 5.30 j)*10^6 m/s

(b) The total kinetic energy is:

Ek = (1/2)(m1 v1^2 + m2 v2^ + m3 v3^2)

Ek = 3.40 * 10^13 J

Velocity can be notion of as the rate at which an object covers distance. A quick-moving object has a high speed and covers a notably big distance in a given amount of time, whilst a sluggish-shifting item covers a relatively small amount of distance in the same amount of time.

The primary unit or the S.I. unit of velocity is m/s or ms?¹.

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Answer:

μ = 0.125

Explanation:

To solve this problem, which is generally asked for the coefficient of friction, we will use the conservation of energy.

Let's start working on the ramp

starting point. Highest point of the ramp

         Em₀ = U = m h y

final point. Lower part of the ramp, before entering the rough surface

        \(Em_{f}\) = K = ½ m v²

as they indicate that there is no friction on the ramp

          Em₀ = Em_{f}

          m g y = ½ m v²

          v = \(\sqrt{2gy}\)

we calculate

          v = √(2 9.8 0.25)

           v = 2.21 m / s

in the rough part we use the relationship between work and kinetic energy

          W = ΔK = K_{f} -K₀

as it stops the final kinetic energy is zero

          W = -K₀

The work is done by the friction force, which opposes the movement

          W = - fr x

friction force has the expression

          fr = μ N

let's write Newton's second law for the vertical axis

         N-W = 0

         N = W = m g

we substitute

            -μ m g x = - ½ m v²

           μ = \(\frac{v^{2} }{2 g x}\)

Let's calculate

           μ = \(\frac{2.21^{2}}{2\ 9.8\ 2.0}\)

           μ = 0.125

A 8.0 kg box is released from rest at a height y0 = 0.25 m on a frictionless ramp. The box slides from the ramp onto a rough horizontal surface. The box slides 2.0 m horizontally until it stops.

What is the friction coefficient of the horizontal surface?

Answer: 0.125

Answer:

because sound needs medium to transmit.

The sound is produced by vibration and if there is no medium there is no vibration and no vibration means no sound.

When the molecules of carbon dioxide is heated, it is disintegrated into molecules of carbon monoxide and oxygen atoms.

CO2 → CO + O

This is the basic reaction expected to happen by carbon dioxide molecules are heated. However it may also disintegrate into C2, O2, C, etc.

Since heat is absorbed in this reaction, it is an example of endothermic reaction. In an exothermic reaction heat is released. These are the basic two types of chemical reactions on basis of heat.

Therefore, when the molecules of carbon dioxide is heated, it is disintegrated into molecules of carbon monoxide and oxygen atoms.

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Answer:

540m/s

Explanation:

v= u + at

u change t to seconds

Answer: The Elephant

Explanation: Well i really don't know but i'ma going to take a guess

The Elephant is bigger and will be harder to push the the mouse. Sorry and have a great day :)

Answer:

Xe

Explanation:

At low temperatures or high pressures, real gases deviate significantly from ideal gas behavior. It is also good to know that ideal gas law assumes that the gas molecules have negligible/no size.

Keeping that in mind, Xe is the largest of the bunch, and therefore is expected to have the greatest deviation of the ideal gas when under high pressure or low temperature.

Hope this helped

A force is an effect that changes, or accelerates, the velocity of a mass-moving object (such as one that is traveling from a state of rest).

Thus, It is a vector quantity since it can be a push or a pull and always has magnitude and direction. It is denoted by the letter F (formerly P) and is measured in newtons (N), the SI unit of force.

The net force acting on an object is equal to the rate at which its momentum varies over time, according to Newton's second law in its original formulation.

According to this equation, the acceleration of an item is directly proportional to the net force acting on it, is in the direction of, and has a constant mass.

Thus, A force is an effect that changes, or accelerates, the velocity of a mass-moving object (such as one that is traveling from a state of rest).

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The centripetal force acting on the stone, during the circular motion is 314.07 N.

Length of the string, L = 0.5 m

Mass of the stone attached to the string, m = 1 kg

Velocity with which the stone is moving through the vertical circlr, v = 5 m/s

Length, L = 2πr

Therefore, the radius of the circular path,

r = L/2π

r = 0.5/(2 x 3.14)

r = 0.0796 m

The expression for the centripetal force acting on the stone, during the circular motion is given by,

F = mv²/r

F = 1 x 5 x 5/0.0796

F = 25/0.0796

F = 314.07 N

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The slope of the force-versus-acceleration graph represents the mass of the system according to Newton's second law of motion. In an ideal experimental setup, the measured slope should match the actual mass of the object being tested.

The physical quantity represented by the slope of the force-versus-acceleration graph is mass. According to Newton's second law of motion, force is equal to mass multiplied by acceleration (F = ma). Therefore, the slope of the graph gives us the mass of the object being measured. In terms of the experimental setup, the slope of the force-versus-acceleration graph should match the mass of the object being tested. If the experiment is conducted accurately and the force and acceleration measurements are precise, the slope of the graph should correspond to the actual mass of the object. However, it's important to note that experimental uncertainties, measurement errors, and external factors can introduce discrepancies between the expected slope and the actual measured slope. Careful calibration and control of experimental conditions are necessary to ensure accurate results.

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Answer:

4 amp

Explanation:

From ohm's law,

V=IR

so,

I=V/R

I=120/30

I=4amp ans..

Answer:

The mobile electric energy gets converted into chemical energy while charging.

Explanation:

According to the law of conservation of energy, no energy is destroyed when one form of energy is transformed to another in the process as energy cannot be created or destroyed. As a result, total amount of energy remains same before and after any kind of transformation.

Generally, lithium ion batteries are used in mobile phones. In such batteries, the electricity is stored in the ionic structure by the chemical changes.

The mobile electric energy gets converted into chemical energy while charging.

Geosynchronous satellites orbit at about four earth radii, where the earth's gravitational pull is strong enough to keep the satellite in a stable orbit.

This orbit is known as the geostationary orbit and is at an altitude of approximately 36,000 kilometers above the Earth's surface. At this altitude, the gravitational pull is still significant enough to keep the satellite in orbit, but not so strong that it will cause the satellite to spiral into the Earth.

The earth’s gravitational pull is given by the formula g = GM/r 2, where G is the universal gravitational constant, M is the mass of the earth, and r is the distance from the center of the earth. The value of g on the surface of the earth is about 9.8 m/s 2.

If we assume that the earth’s radius is about 6.4 × 10 6 m, then four earth radii would be about 2.56 × 10 7 m. Plugging this value into the formula, we get:

g = (6.67 × 10 -11 Nm 2 /kg 2) × (5.97 × 10 24 kg) / (2.56 × 10 7 m) 2

g = 0.61 m/s 2

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The efficiency of the machine is ξ= 50%.

Given - 20 joules and 30 joules are input and output work of the system respectively.

To find the efficiency of the system.

principle ;- Efficiency represents the capability of a system to do work .

Mathematically , efficiency has an equation that relates the input and output work and accurately provides the result.

Formula  -   ξ= οₙ/Iₙ x 100

οₙ = output work , Iₙ= input work

Calculations :-  ξ= { 10/20 }x 100

ξ= 50%

Result- The Efficiency of the machine is 50%.

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Answer:

Explanation:

The sum of all the forces acting on an object is the net force or resultant force. If all the forces cancel out, the resultant force is zero, else, the unbalanced force will cause acceleration of the object. Force is a vector and hence has both a direction and magnitude. For example, gravitational force (on earth) acts in downward direction and has a magnitude equal to mass of the object and acceleration due to gravity. Once we know all the forces that are acting on a body, we resolve all of them into components (typically horizontal and vertical) and take summation of forces in each direction. If such forces cancel out (in each direction), the object maintains its state of rest or constant motion. If however, forces do not cancel out, there is a net resultant force on the object that will cause acceleration of the object (as given by Newton's second law of motion).  

Hope this helps.

The sum of all of the forces acting on an object is called net force. It is categorized as a vector quantity because it has both direction and magnitude to be considered.

Force may be defined as the process of pushing or pulling on an object with mass provoking it to change its velocity. It is an external agent capable of altering a body's state of rest or motion. It has a magnitude and a direction, so it is a vector quantity.

Net force in a case where forces of different magnitude and opposite directions will be the difference between greater and lesser force. The combination of the resultant of all the forces acting on an object is called Net Force, which is basically the sum of all the forces acting on that object.

Therefore, the sum of all of the forces acting on an object is called net force.

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Answer:

the cross section refers to the way in which it is wound, in general to the circle

circle does not depend on what it has inside

Explanation:

A solenoid is a wire wound in general in a circular shape, even when it is not forced, the cross section refers to the way in which it is wound, in general to the circle and is joined to determine the area

          A = π r²

This circle does not depend on what it has inside, that is, it is the same section in the air, in a liquid or with a solid inside,

In a coal plant, the coal is burned, converting its chemical energy into thermal energy. This thermal energy is then transferred from the burner to a boiler full of water.

As the boiler turns the water into steam, it is converted into kinetic energy which is used to turn the turbine. As the turbine turns, the generator's magnets inside a wire, its kinetic energy is converted into electrical energy.

Coal is one of the most widely used fossil fuels for electricity generation. However, burning coal releases harmful pollutants into the atmosphere, including carbon dioxide, sulfur dioxide,

and nitrogen oxides. These emissions contribute to global warming, acid rain, and respiratory diseases.

To address these concerns, many coal plants have implemented technologies such as scrubbers, which remove harmful pollutants from the emissions before they are released into the atmosphere.

Additionally, some coal plants are transitioning to cleaner energy sources such as natural gas, wind, and solar power.

Overall, while coal-fired power plants have played a significant role in powering modern society, their impact on the environment has led to a push for cleaner and more sustainable forms of energy.

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Answer:

B

Explanation:

mass is the amount of matter present in any object or body.

here in the option b, it says they each contain the same amount of matter,

which means they each has the same mass.

Answer:

about 30 km

Explanation:

about 30 km

The event horizon radius of a non- rotating 10 solar mass black hole is about 30 km.

Answer:

b im pretty sure (let me know if this is correct!) :)

Explanation:

The Stefan-Boltzmann law is a fundamental principle of thermodynamics that relates the energy radiated by a body to its temperature. By measuring the total energy emitted by a star, astronomers can calculate its effective temperature using the Stefan-Boltzmann law.

The Stefan-Boltzmann Law is a crucial tool in understanding and interpreting stellar properties. This law relates the luminosity (energy emitted per unit time) of a star to its temperature and size. Mathematically, it is expressed as:

L = σ × A × T^4

Where:
L is the luminosity of the star.
σ is the Stefan-Boltzmann constant (5.67 10-8 W m-2 K-4).
A is the surface area of the star (A = 4R2, where R is the radius).
T is the temperature of the star in Kelvin.

By using this law, astronomers can determine various properties of a star, such as its radius, temperature, and luminosity, by measuring either the temperature or luminosity and using the known values of the Stefan-Boltzmann constant and the star's surface area.

For example, if the temperature and luminosity of a star are known, the radius can be calculated by rearranging the equation:

R = sqrt(L / (4T4))
This allows them to determine the star's luminosity and radius, as well as other important parameters such as its mass and age. The law is particularly useful for understanding the behavior of different types of stars, from cool red dwarfs to hot blue supergiants. Overall, the Stefan-Boltzmann law is a key tool for astronomers in interpreting the complex properties of stellar objects.

Additionally, the Stefan-Boltzmann Law allows astronomers to classify stars based on their temperature and luminosity, enabling a better understanding of stellar evolution and the life cycle of stars.

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Answer:

24 kg

Explanation:

Mass will not change....  WEIGHT will change

  Mass is the amount of matter an object contains...will not change

Answer:

Glass is an optically denser medium than air and water.

Explanation:

hope it helps have a nice night!

Answer:

The speed of light depends on the optical density of the medium. Therefore, light travels with different speeds in different media having different optical densities. For example, the speed of light in air is 3 × 108 m/s, whereas that in glass is 2 × 108 m/s and in water, it is 2.25 × 108 m/s

Answer:

Plural cerebrums cerebra The largest part of the vertebrate brain, filling most of the skull and consisting of two cerebral hemispheres divided by a deep groove and joined by the corpus callosum, a transverse band of nerve fibers. The cerebrum processes complex sensory information and controls voluntary muscle activity.

Explanation:

The final speeds of the spheres are 3.47 m/s and 3.08 m/s.

We can use conservation of momentum to solve this problem since there are no external forces acting on the system.

The initial momentum of the system is:

p_initial = m₁ * v₁ + m₂ * v₂

where m₁ and m₂ are the masses of the spheres, and v₁ and v₂ are their initial velocities (4.00 m/s and 0 m/s, respectively).

After the collision, the momentum of the system is:

p_final = m₁ * v1' + m₂ * v₂'

where v₁' and v₂' are the final velocities of the spheres. We also know that the angle between the first sphere's final path and its initial path is 60 degrees, which means that the angle between the two spheres after the collision is 150 degrees (90 + 60).

Using conservation of momentum, we can set the initial and final momenta equal to each other:

m₁ * v₁ + m₂ * v₂ = m₁ * v₁' + m₂ * v₂'

We can also break down the final velocities into their x and y components using trigonometry. Let's define the angle between the first sphere's final path and the x-axis as theta. Now we can use conservation of momentum to solve for the final velocities:

m₁ * v₁ + m₂ * v₂ = m₁ * v₁' * cos(theta) + m₂ * v₂' * cos(150 degrees)

0 = m₁ * v₁' * sin(theta) + m₂ * v₂' * sin(150 degrees)

Solving the first equation for v₂', we get:

v₂' = (m₁ * v₁ + m₂ * v₂ - m₁ * v₁' * cos(theta)) / (m₂ * cos(150 degrees))

Substituting this expression into the second equation and solving for v₁', we get:

v₁' = (m₂ * sin(150 degrees) * v₁ + m₂ * sin(150 degrees) * v₂ + m₁ * sin(theta) * v₁' - m₁ * sin(theta) * m₂ * v₁ * cos(theta) / cos(150 degrees)) / (m₁ * sin(theta))

Plugging in the given values and solving, we get:

v₁' = 3.47 m/s

v₂' = 3.08 m/s

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The car with a total mass of 1200 kg and an initial velocity of 100 km/h will experience a change in momentum of 33,333.33 kg·m/s when it comes to a standstill.

To calculate the change in momentum, we first need to convert the car's initial velocity from km/h to m/s. We can do this by multiplying the velocity by 1000 (to convert kilometers to meters) and dividing by 3600 (to convert hours to seconds). Thus, the initial velocity in m/s is (100 * 1000) / 3600 ≈ 27.78 m/s.

Now we can find the change in momentum using the formula:

Change in momentum = total mass * (final velocity - initial velocity)

Since the car comes to a standstill, its final velocity is 0 m/s. Therefore, the change in momentum is:

Change in momentum = 1200 kg * (0 m/s - 27.78 m/s) = -33,333.33 kg·m/s

However, the change in momentum is often expressed as a positive value representing the magnitude of the change. Thus, the change in momentum the car experiences while coming to a standstill is 33,333.33 kg·m/s.

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When a rock is thrown straight upward, its initial speed is 30 m/s. As the rock moves against the force of gravity, it gradually loses its upward velocity until it reaches its highest point, known as the peak of its trajectory.

At this point, its velocity becomes zero momentarily before it starts to descend.

The key to finding the rock's speed when it returns to the original point of launch is to understand that the magnitude of its velocity at any point during the motion is determined solely by the initial velocity and the acceleration due to gravity. The acceleration due to gravity is constant and acts in the downward direction with a value of approximately 9.8 m/s².

Since the velocity decreases by 9.8 m/s every second, it will take the same amount of time to return to the original point of launch as it took to reach the highest point. This means that the time of flight is equal to the time it took for the rock to reach its peak. Using the kinematic equation:

v = u - gt,

where v is the final velocity, u is the initial velocity, g is the acceleration due to gravity, and t is the time, we can find the time it took for the rock to reach its peak:

0 = 30 - 9.8t.

Rearranging the equation, we have:

t = 30/9.8.

Plugging in the values, we find that t ≈ 3.06 seconds. Therefore, the rock will take approximately 3.06 seconds to return to the original point of launch.

To find the final velocity when it returns to the ground, we use the same kinematic equation:

v = u - gt,

where u is the initial velocity (30 m/s), g is the acceleration due to gravity (9.8 m/s²), and t is the time of flight (3.06 seconds). Plugging in the values:

v = 30 - 9.8 * 3.06,

v ≈ -8.68 m/s.

The negative sign indicates that the velocity is now in the opposite direction, pointing downward. Therefore, the speed when the rock returns to the original point of launch is approximately 8.68 m/s.

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Compared to the emitted radio waves, the radio waves reflected from the vehicle and received by the radar gun have a higher frequency.

Frequency is defined as the number of repetitions of a wave occurring waves in 1 second. Its unit is Hz. Frequency is given by the formula as,

A moving car is targeted by radio waves sent from a radar gun by a police officer standing still.

The radio waves reflected off the vehicle and picked up by the radar gun have a greater frequency than the radio waves that were transmitted.

A stationary police officer directs radio waves emitted by a radar gun at a vehicle moving toward the officer.

Compared to the emitted radio waves, the radio waves reflected from the vehicle and received by the radar gun have a higher frequency.

Hence the higher frequency is the correct answer for blanks.

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