Aski gondola is connected to the top of a hill by a steel cable oflength 620 m and diameter 1.5 cm. as thegondola comes to the end of its run, it bumps into the terminal andsends a wave pulse along the cable. it is observed that it took14 s for the pulse to travel the length ofthe cable and then return.
(a) what is the speed of the pulse?
m/s
(b) what is the tension in the cable?
n

Explanation:

Given

Length of cable

Diameter of cable

time taken to return to original position

time taken to cover distance L

velocity

(b)Relation between velocity of wave Tension is

mass per unit Length

where

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.