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Sveta_85 [38]
2 years ago
14

Why can't you hear a sound in space ?

Physics
1 answer:
Anastaziya [24]2 years ago
5 0

Answer:

As the vibrations of the particles reach your ear, your ear drum receives the vibrations which the brain then interprets as sound. In the vacuum of space, there are no (or very, very few) particles to vibrate, so sound cannot travel through this medium.

Explanation:

You might be interested in
6. Mr. Leppold jumps out of a plane with a parachute...before the chute opens,
polet [3.4K]

1) He has both potential and kinetic energy

2) Before the parachute opens, the potential energy decreases and the kinetic energy increases

Explanation:

1)

The gravitational potential energy of a body is the energy possessed by the object due to its position in a gravitational field, and it is given by:

PE=mgh

where

m is the mass of the body

g is the acceleration of gravity

h is the height of the body above the ground

On the other hand, the kinetic energy of a body is the energy possessed by the body due to its motion; it is given by

KE=\frac{1}{2}mv^2

where

v is the speed of the object

Here Mr. Leppold has both potential and kinetic energy before opening the parachute, because:

- It is moving at a certain speed, so v\neq 0, therefore he has kinetic energy

- He is at a certain height above the ground, h\neq 0, therefore he has potential energy

2)

The total mechanical energy of Mr.Leppold is the sum of the potential and the kinetic energy:

E=PE+KE

According to the law of conservation of energy, in absence of air resistance, this quantity remains constant.

During the fall, the height of Leppold decreases: this means that as h decreases, the potential energy decreases  too.

However, the total energy E must remain constant: therefore, this means that the kinetic energy KE must increase, and this occurs because the speed of Mr. Leppold increases as he falls.

Learn more about kinetic and potential energy:

brainly.com/question/6536722

brainly.com/question/1198647

brainly.com/question/10770261

#LearnwithBrainly

8 0
3 years ago
Derived and define the units​
Vadim26 [7]
Dont click on the link its a scam btw
8 0
2 years ago
1.Do parallel universe exist? How?
Harlamova29_29 [7]

Answer:

Some physicists believe in a flatter version of multiple universes. ... But if the universe began at a finite point, as nearly every physicist agrees that it did, an alternate version of you likely doesn't exist, according to astrophysicist Ethan Siegel's 2015 Medium article.

7 0
2 years ago
Increase or decrease? 35 points ??? Please help
Oksanka [162]

Answer:    

increase, GPE, KE, KE, KE, PE, PE, KE, KE,

Explanation:

4 0
3 years ago
A rolling rock with a velocity of 20 m/s has a momentum of 5000 kg m/s. What is the rock’s mass
evablogger [386]

Answer:

<h2>250 kg</h2>

Explanation:

The mass of the rock can be found by using the formula

m =  \frac{p}{v}  \\

p is the momentum

v is the velocity

From the question we have

m =  \frac{5000}{20}  =  \frac{500}{2}  = 250 \\

We have the final answer as

<h3>250 kg</h3>

Hope this helps you

8 0
3 years ago
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