Afire hose must be able to shoot a stream of water a specified height, straight up. calculate the gauge pressure (difference between actual pressure and atmospheric pressure) required in the water main supplying the hose. assume that the diameter of the main is sufficiently larger than that of the hose that the velocity of the water in the main is negligible.

If this plastic cup is heated to its melting point, what will eventually happen to all the particles in the plastic? a. the particles will begin to move enough that they slide past each other. b. bonds will form and the liquid will become a solid. c. the spaces between the particles will get smaller. d. the particles will change state and become a crystalline solid.

Afixed electric space heater wired by a cable with an ampacity of 30 a should draw a maximum current of a. 30 a. b. 24 a. c. 15 a. d. 27 a.

Arowboat passenger uses an oar to push the boat off the dock by exerting a force of 40n for 3.0s. what impulse acts on the boat.