A solid metal ball with a mass of 10.0 kg is placed on a smooth floor what force would be needed to accelerate the ball at a rate of 2.0 m/s2. 40 N
20 N
5 N
0.2 N

"an open tank has the shape of a right circular cone. the tank is 6 feet across the top and 5 feet high. how much work is done in emptying the tank by pumping the water over the top edge? note: the density of water is 62.4 lbs per cubic foot."

Which two particles are found in the center of an atom

What happens to the vapor pressure of a substance when its surface area is increased at constant temperature?