If the man falls with his knees and ankles locked, the only cushion for his fall is an approximately 0.54-cm give in the pads of his feet. Calculate the average force exerted on him by the ground during this 0.54 cm of travel. This average force is sufficient to cause damage to cartilage in the joints or to break bones.

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.

no

sodium is solid at rt

d) physical means can be used to separate the components of air.