Apiece of rope is pulled by two people in a tug-of-war. each exerts a 400-n force. what is the tension in the rope?

400 N

Explanation:

According to Newton's third law of motion: For every action, there is an equal and opposite reaction. The tension in the rope occurs due to the amount of the force by which the rope is pulled.

There is zero acceleration in the rope as it is being pulled from opposite ends with equal force.

consider one half of the rope:

Thus, tension in the rope = 400 N

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.

luster is not a good characteristic to use by itself because luster is the property of minerals that indicates how much the surface of a mineral reflects light. the luster of a mineral is affected by the brilliance of the light used to observe the mineral surface.