Johannes Keller's theory was based upon analysis of planet observations taken by tycoon Brahe

True or false

In the early 1980s, scientists found that the amount of heat energy produced by the sun decreased by 0.1 percent over a period of 18 months.

The distance between earth and moon is almost 384,400 km the distance can be written in scientific notation as a x 10b km where a = and b=

What is the acceleration of a skier that goes from 2.50 m/s to 14.5 m/s while traveling 505 m down a slope?

A car impacting another car head on will double the force of impact

Both Kepler's laws and Newton's laws tell us something about the motion of the planets, but there are fundamental differences between them. What are the differences? Select all of the true statements.

Recall that in the equilibrium position, the upward force of the spring balances the force of gravity on the weight.

At one instant, the center of mass of a system of two particles is located on the x-axis at 2.0 cm and has a velocity of (5.0 m/s) ˆx. One of the particles is at the origin. The other particle has a mass of 0.

A 91 kg block is released at a 6 m height as shown. The track is frictionless. The block travels down the track, hits a spring of force constant k = 1968 N/m. The acceleration of gravity is 9.

Why do charges build up on clothing in an electric dryer?

Two plates with area A are held a distance d apart and have a net charge + Q, and - Q, respectively. Assume that all the charge is uniformly distributed on the inner surfaces of the plates.