4. At the top of a hill, a skater has a gravitational potential energy of 125J. What

is the total kinetic energy at the bottom of the hill of the skater if energy is

conserved?

An electroscope is a fork-shaped device commonly used to detect the presence of charge. The tin leaves of an electroscope will separate when charged negatively.

What causes seasons to occur in certain zones? a. tilt of Earth axis b. height of mountains c. longitude of the zone d. amount of rainfall

What must gymnasts begin to train at a very early age

Why is carbon and nitrogen important?

Two planets of the same mass are observed. Which of the following distances between the two planets would result in the least gravitational attraction? A. 90 light years B. 80 light years C. 60 light years D. 50 light years

The train speeds passed Holly at 70 km/h north ward. This spider crawls past lukes foot in the same direction at 30 m/h. What is the velocity of the spider relative to Holly?

What is the name of a particle with no charge in an atom?

What voltage produces a current of 500 amps with a resistance of 50 ohms?

What is cell in electricity?

When a siren is approaching you, how does the wavelength of the waves reaching you compare to the actual wavelength that the siren emits?