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LenKa [72]
2 years ago
11

The speed of sound in air is around 330 m/s. If a bat emits a single high-pitched ‘click’ of sound in a cave that is 25m wide, c

alculate the time taken for the echo of the sound to return to the bat.
Physics
1 answer:
Bingel [31]2 years ago
4 0

Answer:

0.15 s

Explanation:

From the question given above, the following data were obtained:

Speed of sound (v) = 330 m/s

Distance (x) = 25 m

Time (t) =?

The time taken for the echo of the sound to the bat can be obtained as follow:

v = 2x / t

330 = 2 × 25 / t

330 = 50 / t

Cross multiply

330 × t = 50

Divide both side by 330

t = 50 / 330

t = 0.15 s

Thus, it will take 0.15 s for the echo of the sound to the bat

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Answer:

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Explanation:

<u>Given the following data;</u>

Radius, r = 2.6 km

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2.6 km to meters = 2.6 * 1000 = 2600 meters

To find the magnitude of centripetal acceleration;

First of all, we would determine the circular speed of the car using the formula;

Circular \; speed (V) = \frac {2 \pi r}{t}

Where;

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Substituting into the formula, we have;

Circular \; speed (V) = \frac {2*3.142*2600}{360}

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Circular speed, V = 45.38 m/s

Next, we find the centripetal acceleration;

Mathematically, centripetal acceleration is given by the formula;

Centripetal \; acceleration = \frac {V^{2}}{r}

Where;

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Substituting into the formula, we have;

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The friction force when an object is moving on a horizontal surface is calculated by:

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