Answer:
The answer is most likely B, however it could be C. Here is why:
Explanation:
permanent magnets can usually withstand being dropped a couple of times. However, if you drop it enough and with enough force, it is possible to make it loose magnetism. If you do not have this kind of patience, it is more effective (an much more fun) to hit it really hard with a hammer.
When something is magnetized, all of the atoms are facing a different direction. When you drop it/throw it/hit it with enough force, it causes the atoms to spin, so they are not all facing the same way.
Answer:
B. increase, because the partial pressure of CO2 in the blood will decrease.
Explanation:
The presence of carbon dioxide gas in blood imparts H+ ions due to its reaction with H2O and thereby, lowers down the blood pH.
When more air reaches alveoli, the rate of gaseous exchange is increased. More of the carbon dioxide is removed from the blood and is released out of the body via exhalation.
Removal of carbon dioxide from blood would increase the pH of the blood since the partial pressure of CO2 in the blood would decrease.
