What best describes the motion of the medium particles in a longitudinal wave? the medium does not move. the medium vibrates in all directions. the medium vibrates in the direction of the wave. the medium vibrates parallel to the direction of the wave.

Explanation :

We know that there can be different types of waves. It can be longitudinal and transverse wave as well.

In longitudinal wave, the particles of wave move parallel in the direction of propagation of wave while the medium vibrates in the direction of the wave.

The longitudinal waves travel in the form of compressions and rarefactions.

Hence, the correct option is (C).

i think it’s a. this is because if they measured the mass of something with a mass of 150g, then their final answer would have to be approximately 150g. though all of their answers are almost 150, rosa and tran have the closest answers (or the exact answer) to the accurate one.

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.