A science museum display about energy has a small engine that pulls on a rope to lift a block 1.00 m.
The display indicates that 1.00 J of work is done.
What is the mass of the block?

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

The force needed to overcome static friction is usually less than that needed to overcome kinetic friction. true or false?

An electron moves with a constant horizontal velocity of 3.0 × 106 m/s and no initial vertical velocity as it enters a deflector inside a tv tube. the electron strikes the screen after traveling 26 cm horizontally and 19 cm vertically upward with no horizontal acceleration. what is the constant vertical acceleration provided by the deflector? (the effects of gravity can be ignored.)