Here is a quiz for you guys
DTR's 'Go to Guy'
Joined: Jan 2007
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From: Indiana
96% ! Wow, I amazed myself! Missed #16, it was a DOH! Now a little help on question 45 please. How can atmosphereic pressure change from one baloon to the other if they are all in the same atmosphere? Is atmospheric pressure not the same around all balloons? That one confuses me ......
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Joined: Jun 2002
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From: Winchester, CT
I got a 92%. (I think I need glasses, couldn't see a few!)
VZdude, question 45 is based on gas laws, which says pressure times volume divided by temperature is constant. Since they didn't mention temperature, you can assume it is constant, so it drops out of the equation. Then you have pressure times volume is constant. If all the balloons have the same amount of gas, then the pressure has to reduce to increase the volume, and increase to reduce the volume.
I hope I got that rights, its been 25 years since chemistry class!
Dan
VZdude, question 45 is based on gas laws, which says pressure times volume divided by temperature is constant. Since they didn't mention temperature, you can assume it is constant, so it drops out of the equation. Then you have pressure times volume is constant. If all the balloons have the same amount of gas, then the pressure has to reduce to increase the volume, and increase to reduce the volume.
I hope I got that rights, its been 25 years since chemistry class!
Dan
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From: Shelby NC
I got a 88% not bad for a computer junky. I also belive that 45 was a trick question both answers could have been right. Reminds me when I was in "A" scool in the military and you had to pick the most correct answer of more that one correct answer.
DTR's 'Go to Guy'
Joined: Jan 2007
Posts: 3,811
Likes: 4
From: Indiana
I got a 92%. (I think I need glasses, couldn't see a few!)
VZdude, question 45 is based on gas laws, which says pressure times volume divided by temperature is constant. Since they didn't mention temperature, you can assume it is constant, so it drops out of the equation. Then you have pressure times volume is constant. If all the balloons have the same amount of gas, then the pressure has to reduce to increase the volume, and increase to reduce the volume.
I hope I got that rights, its been 25 years since chemistry class!
Dan
VZdude, question 45 is based on gas laws, which says pressure times volume divided by temperature is constant. Since they didn't mention temperature, you can assume it is constant, so it drops out of the equation. Then you have pressure times volume is constant. If all the balloons have the same amount of gas, then the pressure has to reduce to increase the volume, and increase to reduce the volume.
I hope I got that rights, its been 25 years since chemistry class!
Dan
The atmospheric pressure outside the balloons is highest on which balloon?
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Diurnal (daily) rhythm of air pressure in northern Germany (black curve is air pressure)
Atmospheric pressure is the pressure at any point in the Earth's atmosphere. In most circumstances atmospheric pressure is closely approximated by the hydrostatic pressure caused by the weight of air above the measurement point. Low pressure areas have less atmospheric mass above their location, whereas high pressure areas have more atmospheric mass above their location. Similarly, as elevation increases there is less overlying atmospheric mass, so that pressure decreases with increasing elevation. A column of air 1 square inch in cross section, measured from sea level to the top of the atmosphere, would weigh approximately 14.7 lbf. A 1 m² (11 sq ft) column of air would weigh about 100 kilonewtons (equivalent to a mass of 10.2 tonnes at the surface).
I can only assume after reading all of this, that the balloons are NOT all in the same place! In order for them to all have different atmoshperic conditions OUTSIDE of the balloon, they would in fact HAVE to be in different places. ( or different pressurized boxes, ect.)
Just hate vague questions like that!
Muted one day, Banned the next....... Ah the life of a DTR 1%'er
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From: Ohio: Home of the disappointing sports teams
I feel dumb next to you guys. Maybe thats why I dont work on cars or trucks. However I can build anything you want with wood.
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From: Alberta
But I guess when you're wrenching on Fords you have to come up with an alternate reality to get you through the day
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From: Central Ohio
Exact quote of #45.........
The atmospheric pressure outside the balloons is highest on which balloon?
From Wikipedia, the free encyclopedia
Jump to: navigation, search
Diurnal (daily) rhythm of air pressure in northern Germany (black curve is air pressure)
Atmospheric pressure is the pressure at any point in the Earth's atmosphere. In most circumstances atmospheric pressure is closely approximated by the hydrostatic pressure caused by the weight of air above the measurement point. Low pressure areas have less atmospheric mass above their location, whereas high pressure areas have more atmospheric mass above their location. Similarly, as elevation increases there is less overlying atmospheric mass, so that pressure decreases with increasing elevation. A column of air 1 square inch in cross section, measured from sea level to the top of the atmosphere, would weigh approximately 14.7 lbf. A 1 m² (11 sq ft) column of air would weigh about 100 kilonewtons (equivalent to a mass of 10.2 tonnes at the surface).
I can only assume after reading all of this, that the balloons are NOT all in the same place! In order for them to all have different atmoshperic conditions OUTSIDE of the balloon, they would in fact HAVE to be in different places. ( or different pressurized boxes, ect.)
Just hate vague questions like that!
The atmospheric pressure outside the balloons is highest on which balloon?
From Wikipedia, the free encyclopedia
Jump to: navigation, search
Diurnal (daily) rhythm of air pressure in northern Germany (black curve is air pressure)
Atmospheric pressure is the pressure at any point in the Earth's atmosphere. In most circumstances atmospheric pressure is closely approximated by the hydrostatic pressure caused by the weight of air above the measurement point. Low pressure areas have less atmospheric mass above their location, whereas high pressure areas have more atmospheric mass above their location. Similarly, as elevation increases there is less overlying atmospheric mass, so that pressure decreases with increasing elevation. A column of air 1 square inch in cross section, measured from sea level to the top of the atmosphere, would weigh approximately 14.7 lbf. A 1 m² (11 sq ft) column of air would weigh about 100 kilonewtons (equivalent to a mass of 10.2 tonnes at the surface).
I can only assume after reading all of this, that the balloons are NOT all in the same place! In order for them to all have different atmoshperic conditions OUTSIDE of the balloon, they would in fact HAVE to be in different places. ( or different pressurized boxes, ect.)
Just hate vague questions like that!
DTR's 'Go to Guy'
Joined: Jan 2007
Posts: 3,811
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From: Indiana
Like I said.......dang vague questions! I'm not so **** that I can't stand being wrong, just want to understand why!
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Joined: Dec 2006
Posts: 406
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From: Central Ohio
I agree, someone brought up Temp before.. if they were in the same atmosphere and same gas inside, then Temp would be the determining factor... so it is pretty vague, since they only gave one variable... I guess they force you to assume Temp is same?
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Joined: Apr 2003
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From: Cummins Technical Center, IN
I missed 4 questions-- shoulda missed only one but I rushed because I was feeling cocky after doing a couple.
The baloon question is vague, yes. But if they have the SAME amount of gas (moles) then you should be able to reason that the size of the ballon is purely a function of pressure.
But it's wrong of them temp expect a person to assume that they are in different pressures and simultaneously assume the temps are the same. It shouldbe consistent.
jh
The baloon question is vague, yes. But if they have the SAME amount of gas (moles) then you should be able to reason that the size of the ballon is purely a function of pressure.
But it's wrong of them temp expect a person to assume that they are in different pressures and simultaneously assume the temps are the same. It shouldbe consistent.
jh
