What is the direction of velocity of an object moving along a circular path? ?

We found the centripetal acceleration of the earth as it revolves around the sun. compute the centripetal acceleration of a point on the surface of the earth at the equator caused by the rotation of the earth about its axis. (enter the magnitude. the radius of the earth is 6,371 km.)

What’s #16 asking and how do i solve it?

How can waves travel through ground?