Identify the situation where work is being done.

A. Carrying a box of crayons across the room.

B. Lifting a backpack off the floor

C. Sitting on a stool

D. Holding a football

At 20 ◦C, a rod is exactly 20.05 cm long on a steel ruler. Both the rod and the ruler are placed in an oven at 270 ◦C, where the rod now measures 20.11 cm on the same ruler.

By applying a force of 50N, a pulley system can lift a box with a mass of 20 kg. What is the mechanical advantage of the pulley system?

When a cell reproduces by mitosis, the cell ... A) Produces a sex cell. B) Makes an exact copy of itself. C) It creates a cell that is different from itself. D) Produces four other cells.

Ways in conserving and preserving our water resources in our daily lives

Which transfer of energy occurs mainly through the process of convection?

What is the most advanced life form on earth

Which EM wave is about the size of humans?

Describe how the Catapult works?

Newton's third law of motion states that the force pair acting on different objects consist of two forces that

While working on her science fair project Venus connected a battery to a circuit that contained a light bulb. Venus decided to change the light bulb to a higher resistance, but she wanted to keep the current the same.