What is the force in if the force out was 20 Newtons and the mechanical advantage was 4?

Which feature signifies to astronomers that a distant star is part of a planetary system

In the past, how did people use the systematic movement of celestial bodies? Select all that apply. making agricultural decisions shipping navigation predicting the future spiritual and religious practices tracking storms

When a football is kicked, the action and reaction forces do NOT cancel each other out because A they are equal and opposite, but they do not occur at the same time. B they act on different objects (the kicker's foot and the ball).

A car travels along eastward with a constant velocity. the magnitude of the acceleration of the car is

The production of electricity from fission nuclear reactions in power plants is regulated by controlling A. the amount of electrons available. B. the amount of uranium available. C. the amount of protons available. D.

The planet earth orbits around the sun and also spins around its own axis. 33% part (a) calculate the angular momentum of the earth in its orbit around the sun in kg • m2/s

An electron experiences a magnetic force of magnitude 4.60 x 10^-15 N when moving at an angle of 60.0° with respect to a magnetic field of magnitude 3.50 x 10^-3 T. Find the speed of the electron.

If you jump vertically while inside a fast-moving train that is slowing down, you land: a. a bit behind your original position. b. at your original position. c. a bit ahead of your original position.

In the sky, you see a red star and a blue star. Which one is hotter? A. The red star B. They are probably the same temperature C. The blue star D. The answer will depend on how far away the stars are

Describe the relationship between force and mass when the acceleration of two objects remain constant