What is the difference between potential and kinetic energy? * 1 point
A. Potential energy is energy due to motion. Kinetic energy is stored energy.
B. Potential energy is stored energy. Kinetic energy is energy due to motion.
C. Potential energy results from unbalanced forces. Kinetic energy results from balanced forces.
D. Potential energy results when there is a net force. Kinetic energy results when there is no net force.

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?

Calculate the ratio of h+ ions to oh– ions at a ph = 6. find the concentration of h+ ions to oh– ions listed in table b of your student guide. then divide the h+ concentration by the oh– concentration. record this calculated ratio in table a of your student guide. compare your approximated and calculated ratios of h+ ions to oh– ions at a ph = 6. are they the same? why or why not? record your explanation in table a. what is the concentration of h+ ions at a ph = 6? mol/l what is the concentration of oh– ions at a ph = 6? mol/l what is the ratio of h+ ions to oh– ions at a ph = 6? : 1

If the chemical properties of a substance remain unchanged and appearance or shape of a substance changes it is called a ?