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3 years ago

What is escape velocity?

1 answer:

6 0

<span>It is the lowest velocity which a body must have in order to escape the gravitational attraction of a particular planet or other object.

Every planet has their own corresponding escape velocities. Example - Earth has escape velocity of 11.2 Km/s. It means, if you want to leave the Earth's gravitational field then it's the lowest speed which you need to acquire otherwise you wouldn't do that!

Hope this helps!</span>

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A bat, flying at 7.00 m/s toward a wall, emits a chirp at 50.0 kHz. If the wall reflects this sound pulse, what is the frequency

777dan777 [17]

Answer:

Explanation:

Given

Velocity of bat $v_o=7\ m/s$

Frequency of sound $f=50\ kHz$

velocity of sound $v=340\ m/s$

using Doppler Effect apparent frequency is given by

$f'=f\cdot \frac{v-v_o}{v+v_s}$

where

$f'=$ apparent frequency

v=velocity of sound in the given media

$v_s=$ velocity of source

$v_o=$ velocity of observer

here velocity of source is zero

as source is travelling towards source thus

$f'=50\cdot (\frac{340+7}{340})$

$f'=51.029\ Hz$

3 0

3 years ago

Define density in thermodynamics

oksano4ka [1.4K]

Answer:

total mass (m) of that substance divided by the total volume (V) occupied by that substances

5 0

3 years ago

Which statement is true?

maw [93]

Hello,

I believe that the answer is <span>A) Geothermal power plants use the renewable resource of heat from within the Earth to generate electricity.

I truely hope this helps.</span>

5 0

3 years ago

Read 2 more answers

HELP ASAP Which statement describes the water particles when condensation takes place?

Vladimir [108]

The answer is going to be B

6 0

3 years ago

The Sun appears to move relative to the stars. For example, right now the Sun is in front of the constellation Leo, but in a mon

Crank

Answer:

0.98°

Explanation:

The Sun appears to move across various constellation because of the Earth's revolution around it. This apparent motion is essentially same as the actual motion of the Earth. The orbit of Earth around the Sun is almost circular.

Time taken to complete one revolution = 365 days

Degrees traveled in 365 Days = 360°

The motion per day is

$=\frac{360}{365}$

= 0.98° per day

7 0

3 years ago