If a marble rolls down a ramp at a rate of 8m/s2 and has a mass of 3.5kg, what is the force it will apply to a cup when it strikes it?

Need in all of themmm only answer if you know pls

"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."

Hydrogen and helium are both members of?