Answer:
When i cat climbs a tree it is using energy that was stored away. When you eat you are storing that energy in the food. when you cimb a tree you are burning calorius from that meal.
Atmospheric pressure decreases because air is less dense at higher altitudes. Because the atmospheric pressure is lower, the vapour pressure of the liquid needs to be lower to reach boiling point.
Many things could indicate that a chemical change has occurred. The release of a gas, or bubbling, etc. Just be careful not to mix it up with physical changes. A chemical change means that the chemical structure is different. You can reverse a physical change, but you cannot reverse a chemical reaction.
Answer:
Explanation:
pressure of dry nitrogen gas at 20° = Partial pressure of nitrogen and partial pressure of water at that temperature .
The pressure of dry nitrogen gas= total pressure - vapour pressure of water at 20°C
= 200 k Pa - 2.34 k Pa
= 197.66 kPa.
