Consider two blocks of copper. block a contains 800 atoms and initially has a total of 20 quanta of energy. block b contains 200 atoms and initially has 80 quanta of energy. the two blocks are placed in contact with each other, inside an insulated container (so no thermal energy can be exchanged with the surroundings). after waiting for a long time (for example, an hour), which of the following would you expect to be true?

a. the temperature of block a and the temperature of block b are equal
b. approximately 50 quanta of energy are in block a, and approximately 50 quanta of energy are in block b.
c. the entropy of block a is equal to the entropy of block b.
d. approximately 80 quanta of energy are in block a, and approximately 20 quanta of energy are in block b

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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.

u can delete ur account.

1. go on google and write

2 open this and click on your profile pic and if your profile is not appearing, then u have to log in.

3. when u click on your profile pic, there appears four options on the top.

4. click on the 1st option and scroll down and go at the bottom.

5. click on edit profile.

6. there appears a option 'prefernces' and at that option at the right side , 'edit' is written.

7. click on the edit option.

8. there is a option " i want to delete my account" and click on that.

hope this u

and ur welcm

: )

grav forces affect all objects magnetic forces affect magnetic objects and electric currents