c. What resistor would you put in series with the diode to prevent catastrophic failure even if the diode was hooked up to a 12V supply (e. g. car battery). What would the output in lumens be and what efficacy, lumens/W, could this circuit yield with a 3.0V supply

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.

a is the best answer your welcome

it is a negative acceleration