If 100g of copper is initially at 30°C and it gains 500 J of heat energy, what is its new temperature?

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.

Because the sun is the biggest and if the sun orbits the earth we will be dead probably

Work is reduced while time is decreased

Well it depends on the object or substance