At high altitude pressure is less, pressure difference can damage the plane because there will appearer a thrust on plane from high pressure to low pressure. In order to avoid from damage air pressure inside the plane is adjusted by using air pumps.
48) Inside an aeroplane, flying at a high altitude,
Answer is:
normal atmospheric pressure is maintained by the use of air pumps
Explanation:
Related General Physics MCQ with Answers
Answer is:
Air, water and iron
Explanation:
the speed of sound is more in solids as compared to liquids and speed of sound is more in liquids than in gases
Answer is:
10-3m
Explanation:
1 micron =10-6m So 1000 microns =1000*10-6 = 10-3m.
Answer is:
steel
Explanation:
It happens because in solids the amplitude of wave is less then other medium therefore distance travelled is less in solids therefore speed is increased.
Answer is:
capillary action phenomenon
Explanation:
Capillary action is the phenomenon by which any liquid rises up in a wick or tube. It is due to surface tension of liquids. The height of rice up of liquid is depend upon surface tension of the water. This is occurs in small plants also.