An astronomical telescope has its two lenses spaced 82.1 cmcm apart. If the objective lens has a focal length of 78.0 cmcm, what is the magnification of this telescope

A car travelling with 20 m/s, comes to halt after travelling 18 m. Find the time taken by the car to stop.

How do you calculate final velocity

Which of the following objects has the greatest kinetic energy? a baseball flying through the air at 20 miles per hour a baseball flying through the air at 90 miles per hour a baseball sitting on the ground a baseball flying through the air at 45

During what phase of the moon does a solar eclipse take place01

Velocity times height

Under what conditions will an object experience a gravitational force? Under what conditions will an object experience an electric force? Under what conditions will an object experience a magnetic force?

A basketball player pushes down with a force of 34 N on a basketball that is inflated to a gauge pressure of 9 x 104 Pa. What is the diameter of contact between the ball! and the floor?

Match these terms with their definitions: 1. unit of electrical resistance ampere 2. unit of electromotive force or electrical potential ohm 3. unit for measuring the strength of an electric current volt 4. unit of electrical power watt

In which is momentum conserved: an elastic collision or an inelastic collision?

List the types of radiation in order from least to most damaging.