Please help ASAP if able! I appreciate it A horizontal pipe carries water with v=3.50 m/s and p=137,000 pa. It narrows and V increases pressure to 8.75 m/s. What is the new pressure?

Aboxcar traveling at 12 m/s approaches a string of 5 identical boxcars sitting stationary on the track. the moving boxcar collides and links with the stationary cars and they all move off together along the track. what is the final speed of the cars immediately after the collision? (you may take the mass of each boxcar to be 18,537 kg.)

Which is not a characteristic of a heat pump? a. it is used in air conditioners. b. it uses a refrigerant. c. it requires no work. d. it reverses the normal flow of thermal energy.

Need asap ‼️ 20 pts which gravitational force field diagram is drawn correctly? (answers in pictures below)