If a reaction is exothermic, then which of the following statements is always true? if a reaction is exothermic, then which of the following statements is always true? the products have lower potential energy than the reactants. energy must be added for the reaction to proceed. the products have lower entropy (are more ordered) than the reactants. it occurs extremely quickly.

Aperson stands on a platform, initially at rest, that can rotate freely without friction. the moment of inertia of the person plus the platform is ip. the person holds a spinning bicycle wheel with its axis horizontal. the wheel has moment of inertia iw and angular velocity ωw. take the ωw direction counterclockwise when viewed from above. part a what will be the angular velocity ωp of the platform if the person moves the axis of the wheel so that it points vertically upward?

For which pair of objects would adding the same a

Under the action of a constant force an object accelerates at 7.8 m/s2. what will the acceleration be if (a) the force is halved? (b) the object's mass is halved? (c) the force and the object's mass are both halved? (d) the force is halved and the object's mass is doubled?