The amount of heat that is needed to raise the temperature of 1 kilogram of some material by one degree Celsius is called the blank of the material

To do work, this truck uses energy stored in chemical fuel and an electrical battery. how much total energy does this truck put out?

Which planets are visible without a telescope

Diego is trying to lift a piano to the second floor of his house. diego uses a pulley system and gives a big lift to the piano. the piano moves upward, then stops, and then it starts to fall to the ground. which list best describes the forces on the piano in the proper order? positive force → balanced force → negative force negative force → balanced force → positive force positive force → unbalanced force → negative force negative force → unbalanced force → positive force