A life-line is to be thrown from a ship 30 m above sea level to a drowning crew person. If the victim is 30 m horizontally from the ship:
a. With what horizontal speed should the line be thrown?
b. What is the life-line's impact velocity?

What is hidden during a lunar eclipse? isn't the moon hidden?

Apebble is thrown into a calm lake, ripples are formed from the center and move outward. the water particles in the lake travel in a circular pattern that moves up and down on the surface of a lake, and the energy travels a) diagonally. b) downward. c) horizontally. d) upward.

What is the stall speed at sea level of an airplane that weights 10000 lbs., has a wing area of 300ft^2, and a maximum lift coefficient of 1.4? what is the stall speed if flaps that double cl,max are applied?