What can you do to keep your heart healthy?

Aperson with age is more likely to catch diseases that healthy people usually don’t catch. what are these infections called?

Why do mountaineers become breathless as they reach high altitudes

Abeaker of water was heated and then placed on a bench in the laboratory. the water cooled until it was the same temperature as the air in the laboratory. which of these explains the mechanism by which the water cooled? a. heat energy was transferred from the water to the air. b. water molecules from the water formed warm water currents. c. the water molecules absorbed energy from the molecules in the air. d. the water released radiation until it contained no heat energy.