What is the formula for work?

Which of the following technologies would produce the most energy in light waves? A. Halogen lightbulb B. Radio-controlled toy airplane C. Microwave industrial drying equipment D. Ultraviolet disinfecting wand

Why do sound waves move faster through the ground than through the air? Particles of matter are packed more loosely in the ground than in the air. Particles of matter are packed more tightly in the ground than in the air.

A Fathom is an old depth measure equal to 6 Feet How deep in meters is a 5_ fathom deep water channel show working out

Best definition of an atom A) charged particles that make up all living things B) Negatively charged particles that flow in electric current C) Small particles that make up all matter

The spring in a toy rocket launcher has a spring constant of 13 N/m. How far must you compress the spring to cause it to exert a force of 2.5 N?

The coloring of the blue morpho butterfly is protective. As the butterfly flaps its wings, the angle at which light strikes the wings changes. This causes the butterfly's color to change and makes it difficult for a predator to follow.

What lunar phase would be observed from the earth, if the moon were at a 90° angle with the earth and sun?

Unbalanced contact forces between several objects would result in A. one of the objects moving B. all of the objects moving C. at least one of the objects moving and possibly all of them moving D. none of the objects moving

A heat pump absorbs heat from the atmosphere at a rate of 30 kW. If work is being done to run this heat pump at a rate of 7.7 kW, what is the coefficient of performance (COP) of the heat pump? A) 2.9B) 22C) 0.26D) 3.9E) 4.9

How do astronomers think the sun may have begun