Aclosed tank is partially filled with glycerin. if the air pressure in the tank is 10 psi and the depth of the glycerin is 20 ft. what is the pressure in the lb/ft2 at the bottom of the tank.

Will give brainliest! jay rides his 2.0-kg skateboard. he is moving at speed 5.8 m/s when he pushes off the board and continues to move forward in the air at 5.4 m/s. the board now goes forward at 13 m/s.a. determine jay’s mass.b. determine the change in the internal energy of the system during this process.(express your answer to two significant figures and include the appropriate units.)