As a ball falls freely toward the ground, its total

1 answer:

hjlf3 years ago

3 0

As a ball falls freely toward the ground, its total mechanical energy "remains the same" but it should be noted that its potential energy is decreases at this time.

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A person riding on a bus hears the horn of a car that the bus is approaching. After the bus passes the car and is traveling away

Grace [21]

Answer:

option (c)

Explanation:

According to the doppler's effect, the frequency of sound decreases.

If there is a relative motion between the source and the observer, the frequency of sound changes apparently.

the formula of the doppler effect is given by

$f' =\frac{v-v_{o}}{v}}f$

where, f is the real frequency, v be the speed of sound, vo be the speed of the observer, here, the bus is the observer.

So, the value of f' < f

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3 years ago

Explain the difference between speed and vilocity?

Zolol [24]

Answer:

The short answer is that velocity is the speed with a direction, while speed does not have a direction.

Explanation:

Speed is how fast an object is moving. It is calculated by the displacement of space per a unit of time. Velocity is the rate at which an object changes position in a certain direction. It is calculated by the displacement of space per a unit of time in a certain direction. Velocity deals with direction, while speed does not.

5 0

3 years ago

Some believe that the positions of the planets at the time

laila [671]

Answer:

$1.4007\times 10^{-8}\ N$