How does an egg drop device being dropped demonstrate newton's 3rd law?

When you push downward on a book at rest on a table, you feel an upward force. does this force depend on friction? defend your answer.

6–43 a food department is kept at 2128c by a refrigerator in an environment at 308c. the total heat gain to the food department is estimated to be 3300 kj/h and the heat rejection in the condenser is 4800 kj/h. determine the power input to the compressor, in kw and the cop of the refrigerator.

What is the relationship between globular clusters and the milky way?