The inner cylinder of a long, cylindrical capacitor has radius ra and linear charge density of +λ. It is surrounded by a coaxial cylindrical conducting shell with inner radius rb and linear charge density −λ. A) What is the electric field? (Hint: use Gauss's law)
B) What is the energy density in the region between the conductors at a distance r from the axis?
C) Integrate the energy density calculated in part B) over the volume between the conductors in a length L of the capacitor to obtain the total electric-field per unit length.

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.

co2reflects heat radiation back to earth buning coal and oil emits co2 globe warms

i am pretty sure it is c because when people are closer together, they cannot move as freely. picture being in a mostly full elevator, for instance. the people are right next to you, and you can barely move.