) What is work? Write down the types of work.​

In an elastic collision, the total kinetic energy and momentum of the system are conserved. So, in the case of a hard billiard ball elastically colliding with another hard billiard ball of equal mass,

There are two possible situations that can occur. These situations are as follows:

When the two hard billiard balls collide head-on and return with equal speed.When the two hard billiard balls collide at an angle, they deflect at the same angle, and their speed remains the same.

Elasticity refers to the ability of a substance to return to its original shape and size when an external force is applied to it.

Elasticity is an essential concept in the field of physics and is used to describe the behavior of materials under stress.The coefficient of restitution is a measure of the elasticity of an object.

It is defined as the ratio of the relative speed of separation to the relative speed of approach after a collision between two objects.

The coefficient of restitution ranges from 0 to 1, with 0 representing a completely inelastic collision and 1 representing a completely elastic collision.

When two hard billiard balls elastically collide, they can either collide head-on and return with equal speed or collide at an angle and deflect at the same angle while maintaining the same speed.

Elasticity is a fundamental concept that is used to describe the behavior of materials under stress. The coefficient of restitution is a measure of the elasticity of an object.

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Answer:

Explanation:

Mass = 50kg +7kg +4kg =61 kg

Velocity = 3m/s

Momentum = mass × velocity

\(p =61\times 3\\\\p =183MLT^-^1\)

Answer:

Mass= 61 kg. Success to The homework.

Answer:

Explanation:

To determine the height of the building, we can use the kinematic equation for vertical motion:

h = v₀t + (1/2)gt²

Where:

h is the height of the building

v₀ is the initial velocity of the ball (25 m/s)

t is the time taken for the ball to reach the ground (10 seconds)

g is the acceleration due to gravity (approximately 9.8 m/s²)

Plugging in the values:

h = (25 m/s)(10 s) + (1/2)(9.8 m/s²)(10 s)²

h = 250 m + (1/2)(9.8 m/s²)(100 s²)

h = 250 m + 490 m

h = 740 m

Therefore, the height of the building is approximately 740 meters.

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Answer:

B

Explanation:

Water is essential to most bodily functions.

The resultant of the forces is 29 N. Option D

The resultant force is the force that acts in a given direction. Now we have two forces as enumerated in the question.

Thus;

Resultant = √(10)^2 + (20)^2 - [2 * 10 * 20 * cos (60 - 30))

Resultant = 29 N

Thus, the resultant of the forces is 29 N.

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Missing parts;

Two forces of magnitude 10N and 20N act on a body in directions making angles 30° and 60° respectively with x-axis what is the resultant force

A.17N

B. 19N

C. 23N

D. 29N

E. 37N​

The only to recover from overtraining is to take rest for several days.

Overtraining makes the body to feel weak and tired.

     If the person or a sportsman work more hours or trains continuously without taking rest is known as overtraining. If the people who are taking much time of training they feel week and very tired. Their weakness will get reflect in their performance as poor, health conditions will get very low, mental health will also get affected.

To recover from overtraining they need to take more rest, must take all the medications to promote their health for every single day. To avoid overtraining must lookup and watch the health conditions, mental thought and their values on balanced life.

So, taking rest for several days made to recover from overtraining.

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Short circuit current vs field current slope from the curve for If=0.2 and If=0.4.

Slope = (Isc(If=0.4)-Isc(If=0.2))/2

An electric current modern-day is a circulation of charged debris, which include electrons or ions, transferring through an electrical conductor or space. it's miles measured because the net charge of go with the flow of electrical charge thru a floor or into a manipulated volume.

The current flowing in a circuit may be utilized in a diffusion of approaches from producing warmness to inflicting circuits to exchange, or statistics to be stored in an integrated circuit.

There are three simple currents utilized in business healing electric stimulation units: direct cutting-edge, alternating contemporary, and pulsed modern-day.

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The graphic shows that whereas southern winds would be redirected to the right, northern wind will be redirected to the left.

The Earth wouldn't appear much like it currently does if it ceased rotating on its axis.The absence of the Coriolis Effect would prevent the spiraling of winds, the enlargement of the equatorial area, and the oceanification of the continents.

The Coriolis effect is what appears to be a deflection.Fluids that move over wide areas, like air currents, are comparable to the trajectory of a ball.The Northern Hemisphere gives them the appearance of bending to the right.In the Southern Horizon, where currents seem to bend to a left, the Coriolis force behaves in the opposite direction.

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Answer:

1.Nitrification happens when soil organisms change over ammonium into nitrate. Much of the cover between the carbon cycle and the nitrogen cycle happens within the soil, in forms conducted by soil organisms. Organisms break down supplements, construct modern compounds for their possess development, and inevitably pass on.

The second question im not sure sorry- the positive and negative one ;(

3. Many human activities have a significant impact on the nitrogen cycle. Burning fossil fuels, application of nitrogen-based fertilizers, and other activities can dramatically increase the amount of biologically available nitrogen in an ecosystem. As nitrogen makes up 78% of the atmosphere, there is no shortage of it – it just isn't in a form plants and animals can use.

4. Carbon makes its way through living things as carbon-based compounds, like vitality particles, fats and proteins, in the long run cycling its way back into the environment. Nitrogen is basically found within the air as well and enters the environments as supplements for plants. Water, nitrogen and carbon cycles. Carbon moves from the air and back by means of creatures and plants. Nitrogen moves from the environment and back by means of living beings. Water moves on, over, or underneath the surface of the Soil.

5. Carbon cycle, Nitrogen cycle, Nutrient cycle, Oxygen cycle, Phosphorus cycle, Sulfur cycle, Rock cycle, Water cycle.

6. Wind, water, and ice disintegrate and shape the arrive. Volcanic movement and seismic tremors change the scene in a sensational and frequently savage way. And on a much longer timescale, the development of earth's plates gradually reconfigures seas and landmasses. Each one of these forms plays a part within the Cold and Antarctica.

People affect the physical environment in numerous ways: overpopulation, contamination, burning fossil powers, and deforestation. Changes like these have activated climate alter, soil disintegration, destitute discuss quality, and undrinkable water. Earth's surface is the as it were territory accessible to the human race. Understanding the forms by which that environment has been made and persistently changed is critical to decide the causes of natural degradation.

(A) For the system consisting of the two blocks, the change in the kinetic energy of the system is equal to work done by gravity on the system.

(D) For the system consisting of the two blocks, the pulley and the Earth, the change in the total mechanical energy of the system is zero.

The total initial mechanical energy of the two block system is calculated as follows;

\(m_1gh_1 + \frac{1}{2} m_1v_1_i^2 = m_2gh_2 + \frac{1}{2} m_2v_2_i^2\\\\m_1gh_1 + 0 = m_2gh_2 + 0\\\\m_1gh_1 = m_2gh_2\\\\m_1gh_1 - m_2gh_2 = 0\)

When the block m2 reaches the ground the block m1 attains maximum height and the total mechanical energy at this point is given as;

\(m_1g(h_1 + h_2) + K.E_1 = \frac{1}{2}m_2v_{max}^2 + P.E_2\\\\m_1g(h_1 + h_2 ) -PE_2 = \frac{1}{2}m_2v_{max}^2 - K.E_1\\\\m_1g(h_1 + h_2 ) - 0= \frac{1}{2}m_2v_{max}^2 - 0\\\\m_1g(h_1 + h_2 ) = \frac{1}{2}m_2v_{max}^2\\\\W = \frac{1}{2}m_2v_{max}^2\)

Thus, we can conclude the following before the block m2 reaches the ground;

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The velocity of the ball = 18.84 rad/sec

The centripetal acceleration of the ball = 236.63 m/s²

The centripetal force of the ball = 118.32 N

The mass of the ball = 0.5 kg

The length of the string = 1.5

The time taken = 60 s

The number of rotations = 120

The velocity of the ball can be found using the formula,

              ω = θ / t

where ω is the angular velocity

           θ is the angular rotation

           t is the time taken

Let us substitute the known values in the above equation, we get

               ω = (120 x 2 x 3.14 x 1.5 ) / 60

                    = 1,130.4 / 60

                    = 18.84 radians/sec

The formula for centripetal acceleration is

                α = ω² / r

                    = 18.84² / 1.5

                    = 345.95 / 1.5

                    = 236.63 m / s²

The centripetal force is

              F = mω² / r

                 = 0.5 x 236.63

                 = 118.32 N

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Answer:

Work is said to be done when a force applied to an object moves that object. We can calculate work by multiplying the force by the movement of the object.

Answer:

Work is done by a force on an object if (i) a force acts on the object and (ii) the object is displaced from its original position

Experiment 1 Understanding of low voltage electrical apparatus: Purpose of the experiment1) Master the usage of common electrical tools.2) Master the common identification methods of low pressure.3) Master the function of low-voltage electrical apparatus and their correct application. Experiment contents and requirements

The experiment requires observing common low-voltage apparatus and understanding their structure. The following requirements are required:1. Drawing electrical symbols2. Writing text symbols3. Describing the basic working principle and function of low-voltage electrical components that are observed in the experiment report and content for the experiment report, follow this steps:1. Purchase the uniform standard experimental report paper in the academic affairs office.2. Fill in according to the items specified in the test report.3. Draw the electrical symbols and write the text symbols according to the observed low-voltage electrical components.4.

According to the observed low-voltage electrical components, the basic working principle and function are briefly described.

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Answer:

80 J

Explanation:

PE = mgh

PE = (4 kg)(9.8 m/s^2)(2 m)

PE = 78.4 J and with sig figs, it would be 80 J

Answer:

Explanation:

It's 9.8 m/s^2

Answer:Its A

Explanation:Volcanoes are both destructive and constructive forces. They are constructive because cooled lava is good for the soil. Volcanoes are destructive because the lava can start fires and burn things like houses, trees, and people.

Answer: Action-Reaction force pairs

Explanation: please make me brainiest thanks

Answer:

"action-reaction force pairs"

Explanation:

...

Answer:

A 2.5 g bullet traveling at 350 m/s hits a tree and slows uniformly to a stop while penetrating a distance of 12 cm into the tree's trunk. What is the initial kinetic energy of the bullet? 153.125 J Correct: Your answer is correct.Jan 8, 2020

Explanation:

We will have that the picture that shows the highest average kinetic energy is image B.

The percentage of PE ratios lying between 8.75 and 14.75 is 68.27%.

The price-earnings (PE) ratios of a sample of stocks have a mean value of 11.75 and a standard deviation of 3. If the PE ratios have a bell-shaped distribution, what percentage of PE ratios lie between 8.75 and 14.75. The price-earnings ratio, or P/E ratio, is the ratio of a company's share price to its earnings per share. It is a market valuation ratio that is used to measure a company's relative valuation. It is calculated by dividing a company's market capitalization by its earnings. The P/E ratio is one of the most widely used valuation ratios in the stock market.

The mean of the PE ratios is 11.75, and the standard deviation is 3. The normal distribution has a mean of 0 and a standard deviation of 1. To find the percentage of PE ratios between 8.75 and 14.75, we need to standardize the values using the formula z = (x - mu) / sigma, where x is the value, mu is the mean, and sigma is the standard deviation.The z-score for 8.75 is (8.75 - 11.75) / 3 = -1, and the z-score for 14.75 is (14.75 - 11.75) / 3 = 1. The percentage of PE ratios lying between -1 and 1 is 68.27%, according to the empirical rule. Therefore, the percentage of PE ratios lying between 8.75 and 14.75 is also 68.27%.

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Answer:

13.42m/s

Explanation:

0.5 multiply by 4 = 2kg

360J divided by 2kg = 180

square root 180= 13.42m/s

Answer:

Explanation:

Given

Weight of the bucket = 20N

Mass = Weight/acceleration due to gravity

Mass = 20/9.8

Mass = 2.04kg

Applied force = 75N

Get the acceleration

According to Newton's second law:

F = ma

a = F/m

a = 75/2.04

a = 36.76m/s²

Hence the acceleration of the bucket is 36.76m/s²

As charge flows, the chemical energy of the battery is dissipated as the time of charge flow increases.

Electric power is defined as the rate at which electric energy is dissipated.

The power of the current flowing through the circuit is calculated as follows;

P = IV

P = I x IR

P = I²R

where;

The electric energy is given as;

E = Pt

E = I²Rt

Thus, we can conclude that as charge flows, the chemical energy of the battery is dissipated as the time of charge flow increases.

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The maximum possible angle of refraction for a light beam incident on a still water surface is approximately 48.8°.

The max possible angle of refraction in this scenario will occur when the incident angle is at 90 degrees (or perpendicular) to the surface of the still water. At this angle, the light beam will refract at its maximum angle, which is approximately 48.6 degrees relative to the normal (or perpendicular) to the surface.

The maximum possible angle of refraction for a light beam incident on a still water surface occurs when the angle of incidence is 90°. In this scenario, the angle of refraction can be determined using Snell's Law:

n₁ * sin(θ₁) = n₂ * sin(θ₂)

Here, n₁ is the refractive index of air (approximately 1), θ₁ is the angle of incidence (90°), n₂ is the refractive index of water (approximately 1.33), and θ₂ is the angle of refraction.

1 * sin(90°) = 1.33 * sin(θ₂)

sin(θ₂) = sin(90°) / 1.33

θ₂ = arcsin(sin(90°) / 1.33)

θ₂ ≈ 48.8°

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Because of Kinetic Theory Postulate, the gas molecule's collision will affect.

Gases can be compressed because most of the volume of gas is an empty space according to Kinetic Molecular theory. If we compress a gas without changing its temperature, the average K.E of the gas particles remains the same. There is no change in the speed of the gas molecules with which the particles move in a container, but the container is smaller. So particles travel from one side of the container to the other in a very small period of time. So it means that they strike the walls mostly. Any increase in the frequency of collisions with the walls must increase the pressure of the gas. from Boyle's law, the pressure of gas becomes more significant as the volume of the gas becomes smaller have opposite relation.

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Electromagnetic waves are those waves that are composed of electric and magnetic fields perpendicular to each other and to the direction of the propagation. All electromagnetic waves have the same speed.

That is, 3×10⁸ m/s.

X-ray is one of the electromagnetic waves. So are light, gamma rays, and radio waves.

Thus the speed of all these waves is equal.

Thus, the correct answer is option C, "Same as speed of radio waves"

The final velocity of the Jet from the takeoff is 15.5 m/s.

The final velocity of the jet is determine by applying second kinematic equation, using the principle of average velocity as shown below.

s = (u + v)t/2

where;

s = (0 + v)t/2

2s = vt

v = 2s/t

v = (2 x 9.3) /1.2

v = 15.5 m/s

Thus, the final velocity of the Jet from the takeoff is 15.5 m/s.

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Answer:

True.

Explanation: