Question

At 25°C, sound can travel 100 meters across a football field in 0.29 seconds. Determine the velocity of these sound waves in the direction they travel across the field.
A)
0.0029
m
s


B)
29
m
s


C)
345
m
s


D)
34,500
m
s

Answer 1

Answer: The correct answer is Option C.

Explanation:

Velocity is defined as the rate of change of displacement with respect to time. It is a vector quantity because it requires both magnitude and direction. It is expressed in meters/second (m/s).

Mathematically,

$\text{Velocity}=\frac{d}{t}$

Where,

d = displacement = 100 meters

t = time taken = 0.29 seconds

Putting the values in above equation, we get:

$\text{Velocity}=\frac{100m}{0.29s}\\\\\text{Velocity}=344.82m/s\approx 345m/s$

The sound wave is moving with a velocity os 345 m/s in the direction of the field.

Hence, the correct answer is Option C.

Answer 2

The correct answer my friend would be C