If a ball is thrown into the air with a velocity of 35 ft/s, its height (in feet) after t seconds is given by y = 35t − 16t2. find the velocity when t = 1.

Molten iron fills a mould, which has a volume of 200 cm cubed. calculate the volume when the iron cools and solidifies.

Which type of wave can travel without a medium

This energy transformation diagram represents the energy of a skateboarder moving along a half-pipe. as she skates toward the top of the half-pipe, her original kinetic energy is converted to potential energy and friction. how much of the energy is potential?