Suppose you have two meter sticks, one made of steel and one made of invar (an alloy of iron and nickel), which are the same length (1.00 m) at 0°c. the coefficients of volume expansion for steel and invar are 3.6 × 10-5 /°c and 2.7 × 10-6 /°c respectively. what is their difference in length, in meters, at 20.5°c ? repeat the calculation for two 30.0-m-long surveyor’s tapes

it should be -8.6 cm hope this out

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.

do you have a formula possibly