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Yanka [14]
3 years ago
14

On which one of the surfaces listed below will a toy car released with the same initial speed travel the farthest? *

Physics
1 answer:
irinina [24]3 years ago
5 0
Are you gonna list the surfaces or nah
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A 3 kg brick falls freely from rest from the roof of a building. How far will the brick fall in the first 2.0 seconds?
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Answer:

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Explanation:

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A future use of space stations may be to provide hospitals for severely burned persons. It is very painful for a badly burned pe
inessss [21]

Answer:

1.5min

Explanation:

To solve the problem it is necessary to take into account the concepts related to Period and Centripetal Acceleration.

By definition centripetal acceleration is given by

a_c = \frac{V^2}{r}

Where,

V = Tangencial velocity

r = radius

With our values we know that

a_c = \frac{V^2}{r}

\frac{V^2}{r} = \frac{1}{10}g

Therefore solving to find V, we have:

V = \sqrt{\frac{1}{10}g*r}

V = \sqrt{\frac{9.81*200}{10}}

V = 14m/s

For definition we know that the Time to complete are revolution is given by

t = \frac{Perimeter}{Speed}

t = \frac{2\pi R}{V}

t = \frac{2\pi * 200}{14}

t = 1.5min

6 0
3 years ago
Atmospheric pressure and density at the top of Mount Everest ​
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The summit of Mount Everest has an average pressure around 30 kPa. ... A barometer also measures variations in atmospheric pressure. As altitude increases, the air becomes thinner, the density of air decreases, and the pressure of the air decreases as well.

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4 years ago
As demonstrated by the Doppler Effect, why does sound increase in pitch as a sound source approaches you?
scZoUnD [109]
I think so it ans wold be d.because if the source approaches the observer more and more wavefront will pass and it get squeezed.so wavelength decreases and frequency increases.
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3 years ago
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When velocity is positive and acceleration is negative, what happens to the object’s motion?
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Answer:

Option (D) : The object slows down.

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