If Earth had twice its present mass, but the same radius, the force of gravity would be:

A) Twice as big B) Four times as big C) Half as big D) The same

Why aren't ionic compounds are not able to conduct electricity as solids?

An electric model train travels at 31.50 cm/s around a circular track of radius 1.670 m. how many revolutions does it perform in one second

Researchers want to determine the best temperature for storing batteries. Describe a possible experiment and list the variables to be controlled in that experiment. Be sure to identify the manipulated and the responding variables.

The region outside the orbit of neptune in which a large number of objects composed of rock and ice circle the sun not far from the plane of the ecliptic is called the

Which of these is an example of a mechanical wave? A. the light of the Sun B. a car stuck in traffic C. the shaking from an earthquake D. X-rays from an X-ray machine at the dentist's office

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