Aforce of 10 n stretches a particular spring by 2 cm. how far would a 20 n force stretch that same spring? a force of 10 n stretches a particular spring by 2 cm. how far would a 20 n force stretch that same spring?
a. 20 cm
b. 4 cm
c. 8 cm
d. 2 cm

Explanation:

Given that,

Force acting on the spring,

Stretching in the spring,

Force acting on the spring,

Stretching in the spring,

To find :

How far would a 20 N force stretch that same spring?

Solution,

For the same spring, the value of spring constant must be same. The relation between the force and the spring constant is given by Hooke's law as :

F=kx

Hence, the 20 N force stretch by 4 cm.  

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.