Electrons in Earth's upper atmosphere have typical speeds near 5.78 ✕ 105 m/s. (a)
Calculate the magnitude of Earth's magnetic field if an electron's velocity is perpendicular to the magnetic field and its circular path has a radius of 6.79 ✕ 10−2 m.
(b)
Calculate the number of times per second that an electron circles around a magnetic field line.​

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.

so easy. just google the electromagnetic waves and it’ll pop up.