Earth's magnetic field flips every

A. half million years

B. every other year

C. 100years

A 2-kg bowling ball is 1 meter off the ground on a post when it falls just before it reaches ground it is travelling 4.

Object B is at rest when object A collides with it. The collision is one-dimensional and elastic. After the collision object B has half the velocity that object A had before the collision. Which object has the greater mass?

Which is smallest: 9*6 or 8*7 or 5*11?

The secret recipe to the ever-popular veggie burgers in the college cafeteria is hidden in a drawer in the director's office.

Mr. Phillips' car is parked on a steep hill with the brakes applied and the engine off. Because of the car's position, it has gravitational potential energy. How could this gravitational potential energy be transformed into kinetic energy? A.

Which is a resource that the National Park Service manages? A. memorials B. wildlife refuges C. ecosystems D. endangered species

Write two examples (mathematical expression) of physical laws that change inversely with the square of the distance.

What units must be used to express the temperature in the equation for the ideal gas law? explain?

Which region of the Sun is typically about 6,000 C?

How well does the infographic ""Plastics in the Ocean"" present a solution to the problem it describes?