A rollercoaster is in motion. Which of the following is NOT a force acting on the rollercoaster?

A. Gravity

B. Friction

C. Velocity

D. Air resistance

Sunspots change in number and location during the solar cycle. This phenomenon is connected to

The diagram shows monochromatic light passing through two openings. What do the areas labeled X, Y, and Z represent?

We have an object with a density of 620g/cm^3 and a volume of 75cm cm^3. What is the mass of this object

What is mechinical advantage

Statement A: Area of a rectangle with measured length = 2.536 m and width = 1.4 m. Statement B: Area of a rectangle with measured length = 2.536 m and width = 1.41 m ...

Which of Newton's laws, when combined algebraically with his law of universal gravitation, can be used to calculate Earth's mass? A) first B) second C) third

Why does a balloon filled with helium rise while a balloon filled with an equal volume of average atmospheric air does not? A. Helium has no mass, but air does. B. Helium increases the balloon's mass more than air. C.

Consider the following controls in an automobile in motion : gas pedal, brake, steering wheel. what are the controls in this list that cause an acceleration of the car?

What material are oil pipelines made from?

3/129 A 175-lb pole vaulter carrying a uniform 16-ft, 10-lb pole approaches the jump with a velocity v and manages to barely clear the bar set at a height of 18 ft. As he clears the bar, his velocity and that of the pole are essentially zero.