When an electron in an atom goes from a lower energy state to a higher energy state, the atom

a. can emit a photon of any frequency.
b. absorbs several photons of a specific frequency.
c. emits a photon of a specific frequency.
d. can absorb a photon of any frequency.
e. absorbs a photon of a specific frequency.
f. produces a continuous spectrum.
g. produces an emission spectrum.

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.

current flows in a wire

+15-35=-20

going in opposite directions