Name two of each of the following. a. Musical instruments that produce sound by vibration of a stretched string
b. Musical instruments that produce sound by vibration of a stretched skin
c. Musical instruments that produce sound by vibration of an air column

If a simple machine reduces the strength of a force, what must be increased?

A14 kg rock starting from rest free falls through a distance of 5.0 m with no air resistance. find the momentum change of the rock caused by its fall and the resulting change in the magnitude of earths velocity. earth mass is 6.0 * 10^24 kg. show your work assuming the rock earth system is closed.

What would people living along the coast in south florida do if there was a hurricane warning? move to locations away from the water flock along coasts to watch the natural phenomenon buy instruments to predict the exact location of the hurricane measure water levels to know the exact time of the hurricane