Mary is trying to determine the charge of an object in the lab. She observes that it is repelled by a positively charged rod. What can you say about the charge of the object?

Why do copper vessels turn green with the passage of time?

Which of the following experiments could you perform to investigate the effect temperature has on the volume of a gas? A. Measure the pressure the air in a tire exerts on a cold day, a warm day, and a hot day. B.

The product of an object's mass and velocity is its

What is the potential energy of a 50 newton object resting on the edge of a cliff 30 meters high?

Explain the relationship between energy and states of matter.

Which force does not operate at a distance of 1 m? A. Weak nuclear O B. Electric C. Gravitational D. Magnetic

The deflection of alpha particles in rutherford's gold foil experiments resulted in what change to the atomic model?

What happens during evaporation? A liquid changes to a gas. A liquid changes to a solid. A gas changes to a liquid. A solid changes to a liquid.

In a nuclear reaction, what is the name for the difference in mass when one type of matter is converted into another? A. radiation B. nucleons C. antimatter D. mass defect

Aspect of the physical world