Physics Homework Solutions

Gas pressure when several gases are put into one tank

Four tanks of gas, labeled A, B, C, and D are stored under different conditions. The gases in these tanks are then placed into a fifth, tank E. Eventually, the combined gases reach a temperature which is that of the 25 degrees celcius room. What will be the gauge pressure of the final sample? Tank information for each tank is ...continues

Gas pressure/ guage pressure part #2

Part #1: Four tanks of gas,labeled A,B,C,and D are stored under different conditions. The gases in these tanks are then placed into a fifth, tank E. Eventually, the combined gases reach a temperature which is that of the 25 degrees celcius room. What will be the gauge pressure of the final sample? Tank information for each tank ...continues

Guage pressure/ membrane problem

Two parts of a closed container are seperated by a membrane which only alows the passage of water. Initially each container holds 5 liters of deionized water. To one side is added 22 grams of chlorine and to the other side is added 15 grams of potassium. Each side has a pressure guage. Which side will record the highest pressure ...continues

momentum/center of mass

"Two people, one of mass 75.6 kg and the other of mass 60.2 kg, sit in a rowboat of mass 82.4 kg. With the boat initially at rest, the two people, who have been sitting at opposite ends of the boat 2.02 m apart from each other, now exchange seats. How far will the boat move?"

Breathing/exercise problem

A certain person is breathing at his normal rate, the associated power of breathing being 120 mW. After a short period of hard exercise, the volume of air being inhaled is doubled. As a result, the power of breathing increases to 960 mW. What is occuring as a result of this increased air volume?

momentum/center of mass

"Two people, one of mass 75.6 kg and the other of mass 60.2 kg, sit in a rowboat of mass 82.4 kg. With the boat initially at rest, the two people, who have been sitting at opposite ends of the boat 2.02 m apart from each other, now exchange seats. How far will the boat move?"

cliff divers jump into the sea at a cliff 36m highat level of sea a rock stiks out horizentally at distance of 6 m

Cliff divers at Acapulco jump into the sea from a cliff 36m High at the level of the sea a rock sticks out a horizental distance at 6m. With what minimum horizental velocity must the cliff divers leave the top of the cliff if they are to miss the rock?

What minimum speed must he have in order to clear the canyon.

A dare devil decide to jump a canyon. Its walls are equally high and 10m apart. He takes off by driving a motor cycle up a short ramp sloped at an angle of 15 degrees. What minimum speed must he have in order to clear the canyon.

collision, coefficient of kinetic friction

"A 9.20à—102 kg Toyota collides into the rear end of a 2.40à—103 kg Cadillac stopped at a red light. The bumpers lock, the brakes are locked, and the two cars skid forward 4.93 m before stopping. The police officer, knowing that the coefficient of kinetic friction between the tires and the road is 0.385, calculates the speed of ...continues

collision

"A 0.343 kg croquet ball makes an elastic head-on collision with a second ball initially at rest. The second ball moves off with one half the original speed of the first ball. 1) What is the mass of the second ball? And 2) what fraction of the original kinetic energy gets transferred to the second ball? "

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