A15 n force directed to the west acts on an object for 3.0 seconds, what is the change in momentum of the object?

Alead ball is dropped into a lake from a diving board 5m above the water . it hits the water with a certain velocity and then sink with constant velocity in bottom . it reaches the bottom 5 second after it is dropped if g= 10m/s2 . find depth of the lake and average velocity of the ball ?

The charge on a charged sphere is: a)concentrated at its centerb)distributed uniformly throughout its volumec)clustered on its centerd)distributed uniformly over its surface

Wavelength of 125 meters is moving at a speed of 10 m/s. what is it's frequency?