If it's a mechanical wave, then its speed depends on the physical characteristics of the medium.
If it's an electromagnetic wave, then its speed depends on the
electrical characteristics of the medium.
Either way, the properties of the medium determine the wave speed.
You want to change the speed ? You have to change the properties
of the medium.
Answer:
the force of the friction is A-0.52
D is correct, Gamma rays have the shortest wavelength.
Well,
When an object's velocity changes, we call it acceleration.
Acceleration: The time rate of change in an object's velocity
