B2. A 2-kg block is released from rest at the top of a rough 30° inclined plane. As the block slides down the incline, its acceleration is 1.5 m/s^2 down the incline. Determine the magnitude of the force of friction acting on the block.

The kinetic energy also decreases when the particles in a liquid state decrease. the liquid is solidifying so the energy is cooling down.

Ithink it is c ,i hope i you

The answer is water molecules are split.cellular respiration and photosynthesis are complement  reactions to each other. these are reverse reactions. in cellular respiration glucose and oxygen yield water and carbon dioxide. so, when respiration begins,  glucose molecules are split. in the opposite reaction - in photosynthesis, carbon dioxide and water yield glucose and oxygen. thus,  when respiration begins, water molecules are split.