In the formula used to solve problems related to the first law of thermodynamics what does q represent?

At time t=0, a particle is located at the point (3,6,9). it travels in a straight line to the point (5,2,7), has speed 8 at (3,6,9) and constant acceleration 2i−4j−2k. find an equation for the position vector of the particle.

If you put a helium-filled balloon in the refrigerator, what will happen?

The direction of the current in an alternating current circuit remains constant. is direct. changes repeatedly. changes randomly.