In the United States, most of our energy comes from this non-renewable resource, which has a negative effect on the environment.

coal

nuclear

natural gas

petroleum

What would be three forces acting on a roller coaster? I have gravity, air resistance, but I can't think of the third.

The width of a particular microwave oven is exactly right to support a standing-wave mode. Measurements of the temperature across the oven show that there are cold spots at each edge of the oven and at three spots in between.

How do speed and acceleration differ

A sky diver of mass 70 Kg, and cross sectional area of 0.2 m2 is falling under gravity. Calculate the terminal velocity of this person. (Assume C = 0.88 kg/m3).

A 0.50 kg apple is 2.0 m above the reference level what is the gpe of the apple earth system

Near the top of the Citigroup Bank building in New York City, there is a 4.00 105 kg mass on springs having adjustable force constants.

Which of the following is true about Viscosity of liquids: A) Liquids with high viscosity do not flow as well as liquids with low viscosity. B) Liquids with high viscosity flow better than liquids with low viscosity.

An object is dropped from a bridge. A second object is thrown downwards 1.0 s later. They both reach the water 20 m below at the same instant. What was the initial speed of the second object

The Congo River is in Africa. True or False

A painter lifts a 3 kg can of paint 3 m above the floor. How much work was done?