At high altitudes, the air pressure is lower and it is more difficult for us to breathe because we cannot take in enough oxygen.
I think answer is A. The Brightness of a Star
Answer:
option (c)
Explanation:
As the liquid 1 rests on the top of liquid 2, it means the density of liquid 2 is more than the liquid 1.
Thus, option (c) is correct.
Answer:
The magnetic field is strongest at the center and weakest between the two poles just outside the bar magnet. The magnetic field lines are densest at the center and least dense between the two poles just outside the bar magnet.
Explanation: