What information does the atomic mass of an element provide? a. the sum of electrons and protons in an atom b. the difference between the number of protons and electrons c. the number of protons and neutrons in an atom d. the number of isotopes

Using the work energy theorem. what is the velocity of a 850kg car after starting at rest when 13,000j of work is done to it.

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On a frictionless air track, a blue glider with mass 0.200 kg is moving to the right with a speed of 8.00 m/s. it strikes a red glider that has mass 0.600 kg and that is initially at rest. after the collision, the blue glider is moving to the left with a speed of 3.00 m/s.(a) what are the magnitude and direction of the velocity of the red glider after the collision? (b) is this collision elastic?