What is 9 - (-9) = in the form of a whole #?

When the forces on an object have a net force of zero (the object is still or going constant speed).

Compare the time taken by the RC car to cover the same distance. Do some go faster or slower?

Evaporation only occurs at the surface of a liquid

Find the electric flux passing through the 45° surface of an upright circular cone with a base diameter of 4 m if the electric field going through it is a uniform 20 N/C directed straight upward.

Double vision can be the result of

What will happen to an electromagnet of the electric current is lost?

How can velocity be used to calculate for an unknown distance? (Logically)

A rod made from insulating material carries a net charge, while a copper sphere is neutral. The rod and the sphere do not touch. Is it possible for the rod and the sphere to (a) attract one another and (b) repel one another? Explain.

Which of the following best explains why mutations cannot cause evolution?

We often use a spoon to cool coffee by stirring. Some of the heat is conducted from the coffee to the air by this method, but the spoon itself will cool the coffee a little.