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Anvisha [2.4K]
3 years ago
9

Using two billiard balls, in 3-4 sentences, design an experiment to demonstrate the law of conservation of momentum.

Physics
1 answer:
kolezko [41]3 years ago
4 0

Answer:

In the explanation

Explanation:

<u>Experiment</u>:

Consider two billiard balls of masses ‘m₁’ and ‘m₂’, moving with velocities ‘u₁’ and ‘u₂’, respectively,  such that u₁ is greater than u₂. After some time, these balls collide with each other and their velocities  become ‘v₁’ and ‘v₂’, respectively.

<u>Observation</u>:

The masses of balls should be measured and their initial and final velocities should be measured.

<u>Result</u>:

In order to prove law of conservation of moment following equation must be satisfied by observed values:

Total\ Momentum\ Before\ Collision = Total\ Momentum\ After\ Collision\\\\m_{1}u_{1} + m_{2}u_{2} = m_{1}v_{1} + m_{2}v_{2}

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An old movie poster used a quote "in space no one can hear you scream!"which of these best explains this quote
soldi70 [24.7K]

I think the complete question is:

An old movie poster used a quote "In space, no one can hear you scream!" Which of these best explains the quote?

A) The quote is incorrect, you can hear sound in outer space.

B) Sound cannot be polarized. So, you cannot hear sound in space.

C) Sound is an electromagnetic wave and needs no medium to travel through.

D) Sound needs a medium for the wave to vibrate and there is nothing in space to vibrate.

Answer:

D) Sound needs a medium for the wave to vibrate and there is nothing in space to vibrate.

Explanation:

There are two types of waves:

  1. Mechanical Waves : These waves requires are medium to travel from one point of space to another point of space. Sound wave is one such example. Since they depend upon medium so speed of travelling also depend upon medium.
  2. Electromagnetic Waves :  These type of waves do not require a medium to travel. If medium exists then it will cause some hindrance in there path but still they will travel. For example: Light waves, X-Rays, Microwaves, Infrared waves, Ultraviolet waves etc.

In space no particle exists so no mechanical waves, such as sound, can travel through it but any electromagnetic wave can travel, such as light. That is why when astronauts are in space walk or when they are in outer space then they do not talk rather they use sign language to communicate

4 0
4 years ago
Read 2 more answers
What is the rate of acceleration due to gravity on Earth?
Katena32 [7]

Answer:

Negative 9.8 meters per second squared

Explanation:

The negative is for the direction (down, towards the center of the earth). Often this can be estimated as -10 m/s^2 to make calculations easier.

3 0
3 years ago
The charge on the sphere is monitored as a beam of monochromatic light shines on the sphere. Initially nothing happens. The wave
Solnce55 [7]

Answer:

explanation of this effect  is  the photoelectric effect

Explanation:

Let's describe the process, when light of large wavelength falls, this implies a small energy, according to Planck's equation

           E = h f = \frac{h \ c}{ \lambda}

the energy of the photons is not enough to carry out an electronic transition between two states of the material, when we decrease the wavelength (the energy of the photons increases), the point is reached where the energy of the beam is equal to some energy of a transition, by which the electrons are promoted and since we can see a certain charge, as the atoms are neutral, some electrons must be removed from the material, this is represented in the macroscopic case as the work function of the material, consequently a unbalanced load that is what we can measure.

When we increase the lightning intensity, what we do is that we increase the number of photons and if each photon can remove an electron, by removing the electrons the difference between it and the positive charge (fixed in the nuclei) increases.

We can analyze the interaction of the photon and the electron as a particular collision.

The explanation of this effect was made by Einstein in his explained of the photoelectric effect

8 0
3 years ago
I use 1 5/7 cans of paint to paint 7/8 of my room. How many cans of paint will I need to paint the entire room?
sergejj [24]

Answer:

y = 2.45 x

Explanation:

given,

Let 'x' be the number of cans.

and 'y' be the total area of the room

now,

From the given statement in the question

\dfrac{15}{7}\times x = \dfrac{7}{8}\times y

y = \dfrac{15}{7}\times \dfrac{8}{7} \times x

      y = 2.45 x

From the Above equation we can state that

To pain the entire room 2.45 cans of paint is required.

8 0
4 years ago
A 350-watt vacuum is plugged into a 120-volt outlet and used for 30 seconds. How much current runs through the vacuum? 2.9 amps
myrzilka [38]

                                           Power  =  (voltage)  x  (current)

                                      350 watts  =  (120 volts) x (current)

                                      350 watts / 120 volts = current

                                            current  =  2.917 Amperes  continuously
3 0
3 years ago
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