How o astronomers gather information to establish the hubble law?

If a force is applied in the same direction of an objects motion, the speed will: if a force is applied in the opposition direction of an objects motion, the speed will:

Why do you think most models show the scale sizes of the planets but do not show the scale distances between the planets?

An object fall from the top of the building 50m high. 1. How long it take to fall? 2. What is it speed when hate the ground? using g=10 meter per second

Alex is asked to move two boxes of books in contact with each other and resting on a rough floor. He decides to move them at the same time by pushing on box A with a horizontal pushing force FP = 8.5 N. Here, A has a mass mA = 11.

Describe Why is it difficult for a human to travel long distance in space

A sound that's produced by a single wave at a constant frequency and with no overtones is called

Which of the following is ignored when determining the relative mass of atoms? protons nucleus electrons. neutrons

Gamma radiation can be significantly reduced by ... A sheet of paper Air A 3 mm thickness of aluminium Several cm of lead

Why is it possible to remove a paper without moving the object on it. (apply newton's law)

If you had a trapped gas and continued to cool it until the lowest possible temperature is reached the temperature is called