In a standing wave, the positions with the highest amplitudes are the points of destructive interference wave troughs amplifications antinodes

In a standing wave, the positions with the highest amplitudes are ANTINODES

Explanation:

As we know that superposition of two waves which travels in opposite direction and is of same frequency will give the effect of maximum and minimum intensity at alternative points

this phenomenon of wave superposition is known as standing waves

so here in standing waves the points of constructive interference is known as Antinodes where the amplitude of the wave is maximum and hence the intensity will be maximum

And all the points where it will form destructive interference is known as Nodes and here at all nodes the amplitude is minimum and the hence the intensity is also minimum

at antinodes

at nodes

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explanation:

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.