A brass sphere with a diameter of 16.0 cm at 68o F is heated up to a temperature of 2840F. The change in volume of the sphere is:. a)14.4cm^3.
b) 115cm^3.
c)6.72 x10^-3 cm^3.

Which statement best explains why an object weight less on mercury than it does on earth

Atank has a shape of a cone with a radius at the top of 2 m and a height of 5 m. the tank also has a 1 m spout at the top of the tank. the tank is filled with water up to a height of 2 m. find the work needed to pump all the water out the top of the spout. (use 9.8 m/s2 for g and the fact that the density of water is 1000 kg/m3.)

The direction of the current in an alternating current circuit remains constant. is direct. changes repeatedly. changes randomly.