Help!!! Where can the hoses be attached in order to provide water to a fire engine? (There may be more than one correct answer.)

house faucet

hydrant

generator

pumper truck

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.

Abowling ball rolling down the lane toward the pins has gravitational potential energy. a. no b. a lot of c. a little

The lid of a pressure cooker forms a nearly airtight seal. steam builds up pressure and increases temperature within the pressure cooker so that food cooks faster than it does in an ordinary pot. the system is defined as the pressure cooker and the water and steam within it. if 2.0 g of water is sealed in a pressure cooker and then vaporized by heating, and 5655 j must be added as heat to completely vaporize the water, what is the change in the system’s internal energy? answer in units of j.