Which planet is covered with red, iron-oxide dust? A. Mercury B. Venus C. Earth D. Mars

7. Calculations. a. If an object has a mass of 20 kg and has a force of 100 N exerted on it, what would be its acceleration? Show your work, including which formula you used!

Newton's law of universal gravitation stars that every object in the universe attracts every other object

What is the effect on an electric current when the voltage is increased? An increase in voltage causes the flow of electric current to

1. Differentiate between heat and temperature. Use an everyday situation to supplement your answer. 2. Write down 3 ways in which temperature can be described.

A small spaceship with a mass of only 2.6 ✕ 103 kg (including an astronaut) is drifting in outer space with negligible gravitational forces acting on it. If the astronaut turns on a 12 kW laser beam, what speed will the ship attain in 1.

Which statement is true about the atom? A: it contains positive electrons, uncharged protons and negative protons. B: it contains uncharged neutrons, positive electrons and negative protons.

Steel objects can become temporary magnets because they are mainly composed of which element?

How long does it takes the sun to rotate the earth?

Which explains how winds move?

Why is it important to develop alternative energy sources