The Kapandu boys dormitory in the UPNG is going up in flames. Rachel, a former student of Physics, who is now a fire fighter, is part of the team who have rushed onto the scene to try to contain the blaze. As she
holds the fire hose she experiences a force exerted on her by the hose. Provided the diameter of the fire
hose is 70 cm, and the water running through the hose flows at 420 L/min, how much force does she need
to hold the nozzle, if its diameter is 0.75 cm?

1. consider the case in which air fills air shocks on a truck trailer. the pressure in the shocks is 2 mpa. the temperature is 300 k. the diameter of the shock piston is 10 cm and the initial length of the cylindrical cavity containing the compressed air is 40 cm. a. the truck is gradually loaded over a period of a day in a static setting. the temperature is held constant for the atmosphere and thus for the gas shock. calculate the compressibility of the air in the shock for this condition when the truck is initially being loaded. b. if the shocks were loaded in a dynamic setting by driving over bumps, what would be the compressibility? state your assumption. c. what is the initial load on the shock if the shock is in an atmospheric 100 kpa? d. if the shock is compressed using the process described in part a, and the air shock compressed air cavity length decreases to 20 cm, what is the additional load applied to the shock?

Clothes dryer uses about 7 amps of current from a 240 volt line. how much power does it use?

In the united states, tornadoes generally occur because of the freezing of ocean water underwater earthquakes meeting of cool and warm air masses shifting of warm and cool ocean currents