some galaxies have regions that are relatively blue other regions appear redder what does this varuation indicate about the differences between these regions?

A 4 kg bar of metal weighs about 8.8 pounds. Approximately how much does it weigh in newtons?

a machine is used to lift crates of oranges has an efficiency of 65%. if the machine provides 1300 newtons through a distance of 50 meters, what is the work output?

A 0.14-kg baseball is dropped from rest from a height of 2.0 m above the ground. what is the magnitude of its momentum just before it hits the ground if we neglect air resistance?

True or false ionic compounds that dissolve in water conduct electricity because they break into gases that move freely

How does the graph of velocity vs. time look for something with a constant positive acceleration? a. a horizontal line. b. an upward sloping straight line. c. a downward sloping straight line. d. a curving line with upward slope.

In what ways does a river carry its load?

What is a unit of mass?

Which is not an era of the Phanerozoic eon

Newton's third law states that when an object exerts a force on another object, the second object exerts an equal but opposite force on the first object. Which of the following shows an example of this? a.

A car is moving 14.4 m/s when it hits the brakes. It slow from 78.8 m, which take 9.92s. It then accelerates at 1.83 m/s 2 for 4.50 s. What is the total displacement?