The air is partially removed at the upper part of the tube and the valve is closed. The height of the water above its pool surface is 0.7 m. The height of the liquid above its pool surface is 0.33 m. The difference in the heights of the pool surfaces is 0.22 m. Required:
Find the density of the unknown liquid.

Which graph best represents the relationship between the electric current and the rate at which a magnet is turning inside an electric generator?

Scout feels ill one day before school. her mother puts a thermometer in her mouth and the temperature begins to climb to 100°f. what is happening between the cooler thermometer and scout's body? a) scout's body is applying a force to the particles in the thermometer. b) kinetic energy is being transferred from her mouth to the thermometer. c) potential energy is being lost by the thermometer and gained by scout's body. d) the potential energy stored in foods is converted to mechanical energy to raise the mercury in the thermometer.

The man of mass m1 and the woman of mass m2 are standing on opposite ends of the platform of mass m0 which moves with negligible friction and is initially at rest with s = 0. the man and woman begin to approach each other. derive an expression for the displacement s of the platform when the two meet in terms of the displacement x1 of the man relative to the platform.