A nail is hit with a hammer with a force of 10 Newtons. The nail moves into the wood with a force . greater than 10 N
equal to 10 N
less than 10N

Which is not a characteristic of a heat pump? a. it is used in air conditioners. b. it uses a refrigerant. c. it requires no work. d. it reverses the normal flow of thermal energy.

Does work output exceed work input when a machine is used? a) yes, it does, as machines create energy. b) it depends on the type of machine used. c) no, it doesn’t, as machines are inefficient. d) no, it doesn’t, as machines cannot create energy.

True or false graphs must include scales that increase by the same amount