Answer:
True
Explanation:
Sound is all about vibrations.
The source of a sound vibrates, bumping into nearby air molecules which in turn bump into their neighbor's, and so forth.
Answer:
1.33m/s²
Explanation:
Given parameters:
Initial velocity = 5m/s
Final velocity = 25m/s
Time taken = 15seconds
Unknown:
Acceleration = ?
Solution:
Acceleration is the rate of change of velocity with time.
Acceleration =
v is the final velocity
u is the initial velocity
t is the time taken
So;
Acceleration =
= 1.33m/s²
Answer:
The value of the final velocity is 
Explanation:
Generally from kinematic equation

Here a is the acceleration which is equivalent to g
So

substituting 6 m for s , 4.2m/s for u

