Force and pressure 2. Pressure and upthrust
D. Solve the following numerical problems.
1. In the given hydraulic press the cross
sectional area of cylinder A, and Az are
0.25m and 8m respectively, what magnitude
of effort is to be applied on cylinder A, to
balance a load of 1000N on the cylinder Ai?

answer: the exterior temperature of commercial jet planes as they leave the stratosphere and return to the ground increases steadily.

explanation:

the lower most layer of atmosphere is troposphere which extends from 0 to 12 km above the surface of the earth. the temperature initially decreases as distance is increased from the earth's surface. commercial jets fly in lower part of the stratosphere. the stratosphere extends upto 50 km. the temperature in stratosphere starts rising again due to presence of ozone which traps the uv rays.

thus, when the planes leave the stratosphere and return to the ground, the exterior temperature increases steadily.

unlike poles attract