Fill in the blanks with the correct values to two significant figures assuming sound propagates as a spherical wave. If the intercity of a sound is Io at a given location and then the distance to the sound source is doubled the intensity decreases to a ___Io and the decibel level decreases by ___dB.

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.

you go to your settings preference and in the end youll see sth that says "i want to delete my acc" click on it and u'll acc will be deleted but u have to wait.

temp rises, and expansion

a.   mass number from atomic number