While sitting in class, your body exerts a force of 600 N on your chair. How much work do you do?

What type of nuclear decay causes the atomic number of an element to increase by 1?

What does si stand for, when referring to a system of measurement

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