a stone that is dropped and starts at rest on earth is in free fall for 8 seconds calculate the stones velocity after 8 seconds ​

The passing of heat through a material while the material itself stays in place. a. radiation b. conduction c. convection

Because light travels in a straight line and casts a shadow, isaac newton hypothesized that light is

Asolid cylinder and a cylindrical shell have the same mass, same radius, and turn on frictionless, horizontal axles. the cylindrical shell has light-weight spokes connecting the shell to the axle. a rope is wrapped around each cylinder and tied to blocks of equal masses that are held the same height above the ground. both blocks are released simultaneously. the ropes do not slip. which block hits the ground first? or is it a tie?