What is the water potential of an open beaker containing pure water

Carbon-14 has a half-life of 5,730 years and most igneous rock is older than that.

For you to be sure whether it is high pressure in the breathing system or to confirm the percentage of air which is taken in and out by the patient

Well,what i learned was that unlike many other  endothermic  reactions,  photosynthesis  does not absorb energy as heat. instead, during plants absorb energy from sunlight to turn carbon dioxide and water into oxygen and glucose, which is a type of sugar molecule. the energy is stored in the glucose molecules, ready to be used when needed.