What is the wavelength of a wave?

a the size of the disturbance
b the distance between two crests of a wave
c the amount of time that occurs in one full cycle
d the amount of cycles that occur in a given time

the correct answer will be marked brainliest, and all answers are appreciated.

A1-lb collar is attached to a spring and slides without friction along a circular rod in a vertical plane. the spring has an undeformed length of 5 in. and a constant k =25 lb/ft. knowing that the collar is released from being held at a determine, the speed of the collar and the normal force between the collar and the rod as the collar passes through b.