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

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,

Where,

d = displacement = 100 meters

t = time taken = 0.29 seconds

Putting the values in above equation, we get:

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: the metamorphic rocks are formed when they are exposed to high pressure and high temperatures. this happens when one of the earth's plates comes in contact with the other plate by traveling in opposite directions, straight into each other or slipping under one another. the friction that is caused by this activity results in   melting of rocks and when it cools they are known as metamorphic rocks. this process needs a controlled amount of pressure and temperature otherwise it may turn into magma.

it was given as a lesson and guide for prayer.