7. What do mechanical waves require in order to transfer energy?

According to Newton's First Law of Motion, a moving object that is not acted on by an unbalanced force will

Which waves cause matter to move back and forth in the same direction? A. longitudinal waves B. transverse waves C. magnetic waves

Ocean water contains quite a bit of NaCl. Aside from it tasting bad, why is it not a good idea to drink ocean water?

Compare and contrast weight and mass

A household refrigerator with a COP of 1.2 removes heat from the refrigerated space at a rate of 40 kJ/min. Determine the rate of heat transfer to the kitchen air in kilojoules per minute to three significant digits.

What is the momentum of a 500-kg car moving at 10 m/s?

Which statement describes the formation of a nebula? A. An elliptical flattened disk begins. B. A bulging core with irregular stars around it forms. C. A large flattened core at the center contracts. D. Gases from a dead star gather and contract.

What are 4 things that can happen to a light wave when it hits an object?

Which of the following is NOT a strategy to prevent falls? a. keeping walking surfaces free from moisture and clutter b. replacing damaged electrical cords c. installing handrails for stairs d. keeping a ladder handy for reaching high places

What are a few things that could not be used as evidence?