What is electricity? Why does it happen?

What two properties must all matter have

if two objects are moved closer together so that the distance between them is one-third the original distance what is the gravitational force after the object is moved

If the accepted value is 343 m/s, what is the best description of Tonya's data? A. accurate but not precise B. precise but not accurate C. both accurate and precise D. neither accurate nor precise

What does us citizenship provide to a person?

At 1000°C and a pressure of 1200 mm Hg, a sample of methane occupies 20.0 L. What will be it's temperature if it is compressed to a volume of 4.00 L and a pressure of 3600 mm Hg?

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