Who can help me with a lab in physics ASAP PLS ig theonlylenn

Awave travels at a speed of 5.2 m/s. if the distance between crests is 0.40 m, what is the frequency of the wave? use f=v/wavelength a. 13 hz b. 2.1 hz c. 0.077 hz d. 5.6 hz

The coefficient of friction is a number that represents the resistance to sliding between two in contact with one another.

Describe how the motion of a spring being pushed forward and backward is similar to the motion of air particles in a sound wave.