A roller coaster begins at the top of a hill. If it accelerates at the rate of 2 m/s2 and has a mass of 2000 kg, what net force is acting on it? (F=ma)

A. 0.001 N

B. 0.5 N

C. 4000 N

D. 1000 N

Passing an electric current through an unknown gas produces several distinct wavelengths of visible light. In this problem, you will find the wavelengths of the unknown spectrum by observing that they form first-order maxima at angles of 24.2°, 30.

Se um corpo 1 está em movimento em relação a um corpo 2, e se o corpo 2 está em repouso em relação a um corpo 3, pode-se afirmar que o corpo 1 está em movimento em relação a 3? Justifique sua resposta.

Work is done if you push a child in a wagon. a. True b. False

a solid sthere made of wood has a diameter of 18 cm and a mass of 3 kilograms. will the sphere float? why or why not? show work

What fossil fuels produce a gas when that are burned that adds to the greenhouse effect

A person riding on the roof of a freight train throws a ball forward. (a) If we ignore air drag and relative to the ground, is the ball moving faster or slower when the train is moving than when it is standing still?

Determine which factors will increase the reaction rate and which factors will decrease te reaction rate.

Read the paragraph below from the section "An Object At Rest Has Potential Energy Potential energy is the energy an object rgy is the energy an object has because of its position. It is energy that is waiting to be released.

Briefly describe the history of the metric system as it applies to the meter and how the definition of a meter has changed over time.

Visible light is an example of?