What types of telescope use a mirror to bring light to focus?

A 300 g ball and a 100 g ball are dropped from a tower. both are the same size and there is no air resistance. when do they hit the ground? A. the 100g mass hits the ground first b. they both hit the ground at the same time c.

Upon which moon does mars exert a stronger gravitational force

The battery of a flashlight develops 3 V, and the current through the bulb is 200 mA. What power is absorbed by the bulb?

Involves the transformation of chemical energy directly into light energy?

Describe the changes in the field of view and the amount of available light when going from low to high power using the compound microscope

My Notes A basketball rolls across a classroom floor without slipping, with its center of mass moving at a certain speed. A block of ice of the same mass is set sliding across the floor with the same speed along a parallel line.

How does sound travel through waves?

Solve for real t: - 25=20t-5t^2

Contrast balanced and unbalanced forces.

A wave will travel only as long as it has energy