Identify scalar and vector quantities: a. The volume of a petrol tank. b. A length measured in meters. c. The jet taking off against the gravity. d. The work done by a force.

If two students are running down the hall toward each other, trying to get to class, and they have the same mass and acceleration, what will happen when they collide? will their forces cancel out or will each one experience a reaction?

Under normal conditions, describe how increasing the temperatures effects the solubility of a typical salt

Is there a point between a 10 nc charge and a 20 nc charge at which the electric field is zero?