How much heat is needed to raise the temperature of 5g of water by 20oC?

Whenever anything happens, energy is conserved. What does this mean about energy before and afterwards.

A uniform stationary ladder of length L and mass M leans against a smooth vertical wall, while its bottom legs rest on a rough horizontal floor. The coefficient of static friction between floor and ladder is μ.

What kind of things rust

Jane slowly paddles her canoe across a calm lake. Explain what makes the boat moves forward. What principle best explains this situation?

A moving object is in equilibrium. Which best describes the motion of the object if no forces change? It will change directions. It will slow down and stop. It will maintain its state of motion. It will speed up and then slow down.

A tennis ball may leave the racket of a top player on the serve with a speed of 60.0 m/s. If the ball's mass is 0.0600 kg and it is in contact with the racket for 0.

Cells are known as the foundation of all life. How have these small structures changed our planet?

What does it mean to dissolve something

Why is a neutral object attracted to a charged object?

The international space station revolves around earths surface. which of the following statement s is true? a. it has no energy because it is stationary b. it has potential energy, but does not have kinetic energy c.