1)Can a star turn into a planet? 2)Can gravity form waves?
3)Does every black hole contain a singularity?
4)Does sound travel faster in space?
5)Does the influence of gravity extend out forever?
6)Galaxies look stationary, so why do scientists say that they rotate?
7)Have aliens ever visited earth?

Awater-filled u-tube manometer is used to measure the pressure inside a tank that contains air. the water level in the u-tube on the side that connects to the tank is 5 ft above the base of the tank. the water level in the other side of the u-tube (which is open to the atmosphere) is 2 ft above the base. determine the pressure within the tank.