In the 1920s what did Edmund hubble notice about the galaxies

The free body diagram below represents Silly Sally hanging from a trapeze bar. Sally weighs 1,000 Newtons. What is the force in each of the chains holding the trapeze bar? A) 1,000 N B) 9,800 N C) 500 N D) 10.41 N

the weight of an object varies inversely as the square of its distance from the center of the earth. the radius of the earth is approximately 4000 miles.

You slide a chair across a rough, horizontal surface. The chair's mass is 18.8 kg. The force you exert on the chair is 156 N directed 26 degrees below the horizontal. While you slide the chair a distance of 5.00 m, the chair's speed changes from 1.

Suppose you have one light bulb in a simple circuit. If you add a second identical light bulb in series, what would happen to the brightness of the first bulb?

What is the kinetic energy of an object that has a mass of 50.0 kg and a velocity of 18 m/s?

In dim light the iris dilates the pupil the pupil dilates the iris cones will transform light into electrical impulses the eye will be unable to see

What force would be required to accelerate a 1,100 kg car to 0.5m/s2

The critical angle for a beam of light passing from water into air is 48.8°. this means that all light rays with an angle of incidence in the water that is greater than 48.8° will be

A beverage can is thrown upward and then falls back down to the floor. As usual, a y axis extends upward (positive direction). Which of the following best describes the acceleration of the can during its free flight?

Which physical parameter more than any other most probably controlled the early evolution of the planetary system and dictated the characteristics of the planets that eventually formed?