1.You are an amateur snorkel and scube diver, so you are engaged to help with cl
ID: 1414997 • Letter: 1
Question
1.You are an amateur snorkel and scube diver, so you are engaged to help with cleaning up debris at the bottom of the canal in New Orleans. You meet several other people at a rowboat which is docked at the edge of the canal. The bottom of the empty rowboat is 4 inches below the waterline. As your group loads the boat, the lowest point below the waterline
A. stays exactly at the same place: 4 inches below the waterline.
B. gets shallower and shallower
C. gets deeper and deeper
D. sinks to the bottom of the canal
2.Your group is assigned to dive to the bottom of the canal and bring up a bunch of compressed gas cylinders which are (or were) filled with helium gas up to a maximum pressure of 1500 psi. Some are empty and some are full. When you dive to the bottom of the canal, you can tell which canysters are full and which are empty, because the compressed gas cylinders which are filled with helium are
heavier than the empty ones.
lighter than the empty ones.
the same weight. You cant tell empty ones from light ones.
not at the bottom of the canal. They can t be. Cylinders full of helium gas would automatically pop to the top of the canal and couldn t sink.
3.You are getting ready to leave New Orleans after a productive time cleaning the canal. Just as you are leaving , your SUV runs out of gas! Luckily another friend has a car with a tank which is 1/3 full and says you can syphon out the gas. You get a long plastic tube and put one end into the partially full gas tank and the other end into a bucket. Nothing happens. You begin to suck on the end of the tube in the bucket, and suddenly gas starts running into your mouth. You rapidly spit out the gas, and put the end quickly into the bucket. Gas smoothly flows out of the hose continuously, filling up the bucket. While the gas is flowing, the pressure at the highest point of the hose (as it comes out of the fill tube of the SUV) is:
greater than atmospheric pressure
equal to atmospheric pressure.
less than atmospheric pressure.
negative.
A.heavier than the empty ones.
B.lighter than the empty ones.
C.the same weight. You cant tell empty ones from light ones.
D.not at the bottom of the canal. They can t be. Cylinders full of helium gas would automatically pop to the top of the canal and couldn t sink.
Explanation / Answer
1)stays exactly at the same place: 4 inches below the waterline
weight of the boat = displed wated
2) lighter than the empty ones
3) equal to atmospheric pressure.
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