The volume control on a surround-sound amplifier is adjusted so the sound intensity level at the listening position increases from 23 to 61 db. what is the ratio of the final sound intensity to the original sound intensity?

Ratio will be

Explanation:

We have given that intensity level is increases from 23 dB to 61 dB

We know that level of intensity is given by

So ------eqn 1

And ------eqn 2

Subtracting eqn 1 from eqn 2

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.