While taking a shower, you notice that the shower head is made up of 44 small round openings, each with a radius of 2.00 mm. you also determine that it takes 3.00 s for the shower to completely fill a 1.00-liter container you hold in the water stream. the water for the shower is pumped by a pump that is 5.70 m below the level of the shower head. the pump maintains an absolute pressure of 1.50 atm. use g = 10 m/s2, and assume that 1 atmosphere is 1.0 105 pa. (a) at what speed does the water emerge from the shower head? (b) what is the speed of the water in the pipe connected to the pump? (c) what is the cross-sectional area of the pipe connected to the pump?

Aproton is projected toward a fixed nucleus of charge +ze with velocity vo. initially the two particles are very far apart. when the proton is a distance r from the nucleus its velocity has decreased to 1/2vo. how far from the nucleus will the proton be when its velocity has dropped to 1/4vo?

An internally reversible refrigerator has a modified coefficient of performance accounting for realistic heat transfer processes of where qin is the refrigerator cooling rate, qout is the heat rejection rate, and is the power input. show that copm can be expressed in terms of the reservoir temperatures tc and th, the cold and hot thermal resistances rt,c and rt,h, and qin, as where rtot rt,c rt,h. also, show that the power input may be expressed as 1.39 a household refrigerator operates with cold- and hot-temperature reservoirs of tc 5 c and th 25 c, respectively. when new, the cold and hot side resistances are rc,n 0.05 k/w and rh,n 0.04 k/w, respectively. over time, dust accumulates on the refrigerator’s condenser coil, which is located behind the refrigerator, increasing the hot side resistance to rh,d 0.1 k/w. it is desired to have a refrigerator cooling rate of qin 750 w. using the results of problem 1.38, determine the modified coefficient of performance and the required power input w under (a) clean and (b) dusty coil conditions. internally reversible refrigerator qout qin w high-temperature reservoir low-temperature reservoir th th,i tc,i tc high-temperature side resistance low-temperature side resistance w qin th tc qinrtot tc qinrtot copm tc qinrtot th tc

Asher cycles 12 miles in 16 hours. what is his speed?