Water flows out of a garden hose which has an opening 2.20 cm in diameter. the flow is such that the water fills a 2.50 gallon bucket in 30.0 seconds. the hose is supplied by an underground pipe 1.10 meter below the exit of the hose. the diameter of the underground pipe is 2.0 inches. (a) what is the flow speed of the water as it exits the hose? (b) what is the flow speed in the underground pipe? (c) what is the gauge pressure in the underground pipe?

How many milliliters of water at 23 °c with a density of 1.00 g/ml must be mixed with 180 ml (about 6 oz) of coffee at 95 °c so that the resulting combination will have a temperature of 60 °c? assume that coffee and water have the same density and the same specific heat. how much will the temperature of a cup (180 g) of coffee at 95 °c be reduced when a 45 g silver spoon (specific heat 0.24 j/g °c) at 25 °c is placed in the coffee and the two are allowed to reach the same temperature? assume that the coffee has the same density and specific heat as water. a 45-g aluminum spoon (specific heat 0.88 j/g °c) at 24 °c is placed in 180 ml (180 g) of coffee at 85 °c and the temperature of the two become equal. (a) what is the final temperature when the two become equal? assume that coffee has the same specific heat as water. (b) the first time a student solved this problem she got an answer of 88 °c. explain why this is clearly an incorrect answer.