What is the speed of a person walking 7mi in 2hours

The molecular formula for phosphorous pentoxide is p4o10. What is its empirical formula?

List 2 uses/applications of geothermal energy.

A grindstone in the shape of a solid disk with a diameter of 1.0 m and a mass of 50.0 kg, is rotating at 900 rev/min. A tool is pressed against the rim with a normal force of 200.0 N, and the grindstone comes to rest in 10.0 s.

a 20000kg railroad car is rolling 6.00m/s when 7000kg olaf id gravel is suddenly dropped in. What's the cars speed after gravel is loaded?

No nuclear reactions occur in the interior of a white dwarf. its brilliance comes from stored heat. therefore, the fate of an isolated white dwarf is to slowly lose its stored energy and dim over a long period of time.

Which of the following is not a good approximation of the relationship between independent and dependent variables? A. independent: first, dependent: next B. independent: input, dependent: output C. independent: cause, dependent: effect D.

A force is applied to a 13.0 kg wagon to pull it down the sidewalk at a constant speed. The coefficient of kinetic friction is 0.65. Considering the resulting frictional force, what is the magnitude of the applied force?

Gravity is the force by which a planet or other body draws objects toward its center. The force of gravity keeps all of the planers in orbit around the Sun.

What wave-like property of light causes it to bend when encountering an opening? A. Reflection B. all the above c. Refraction d. none of the above e. diffraction

Which of the following statements describe sliding friction? Select all that apply. 1.) a force that causes an object to increase speed 2.) a force in which one of the objects involved must be a liquid or a gas 3.