Below are 4 statements about acceleration. Which statement is NOT correct?
A. acceleration always involves changing speed.
B. changing direction always involves acceleration.
C. changing speed always involves acceleration.
D. circular motion always involves acceleration.

What should the power status of a circuit be when measuring resistance with an ohmmeter?

Oxygen and hydrogen gas are at the same temperature t. what is the ratio of kinetic energies of oxygen molecule and hydrogen molecule if oxygen is 16 times heavier than hydrogen.

Rank the six combinations of electric charges on the basis of the electric force acting on q1. define forces pointing to the right as positive and forces pointing to the left as negative. rank positive forces as larger than negative forces. q1,q2,q3 = positive(+) q1 = + q2 = + q3 = - q1 = + q2= - q3= + q1= - q2= + q3= + q1= + q2= - q3= - q1,q2,q3 = negative