Question

7. Which of the following denotes the correct relation of air with pressure?
(a) Higher the speed of wind, lower is the air pressure.
(b) Lower the pressure of air, lower is the speed of air.
(c) Lower the speed of wind, lower is the mass of air.
(d) Higher the mass of air, higher is the air pressure
8. As a precautionary measure during thunderstorms, it is advised to not use umbrellas with metallic ends or to stand anywhere close to metallic poles and large structures. What might be the reason behind this?
(a) The metallic items my get damaged by lightning.
(b) Heavy rainfall may lead to rusting of metallic structures.
(c) Lightning is attracted by metal, which is a good conductor
(d) In case a heavy metallic object were to fall, it could be fatal.​

Answer 1

Answer:

7)a

8)c

Explanation:

when the speed of wind is high,then at that point air layers are having less forces against their moving direction which leads them to have a less pressure.

when it's lightning if you hold a metal with sharp end, positive static electric charges are concentrated around those sharp ends,then when lightning occurs the clouds are negatively charged and those metals with sharp ends are easily attracting lightning.