Air flows over a plane wall at Mach 3.5, the pressure in the flow being 100 kPa. The wall turns through an angle leading to the generation of an oblique shock wave whose strength is such that the pressure downstream of the corner is 548 kPa. Find the turning angle of the corner.

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