3. Sound caused by an explosion on the ocean's surface travels vertically downward to an underwater mountain and is reflected back to a microphone at
the surface. If this takes 11.6 s to occur and sound travels at h1450 m/s in water,
what is the depth to this mountain?

In an experiment, how can i change human errors? be specific.

Which of the following situations is impossible? a) an object has velocity directed east and acceleration directed east. b) an object has zero velocity but non-zero acceleration. c) an object has constant non-zero velocity and changing acceleration. d) an object has velocity directed east and acceleration directed west. e) an object has constant non-zero acceleration and changing velocity.

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.