Finding Volume of a cylinder without height or given the hypotenuse

[contax_shooter]

https://live.staticflickr.com/65535/48050345996_ac242c4d7a_b.jpg

One of the questions in my chemistry lab is asking to find the volume of a cylinder without the height provided. I would use Pythagorean's Theorem using the base (r * 2) and was given the hypotenuse.

I'm stuck with the mass of the cylinder and its radius. I'm not sure if the professor is that involved with applying physics where weight = mass * Earth's gravity, but this seems irrelevant. Any suggestions?

[FromMyColdDeadHand]

Seriously this is a college level chemistry question? What retarded chemistry proff is not using metric units and makes you do conversions?

Uhm, What metal? Their densities and volumes differ so that would affect how tall the cylinder is? Right?

Is the metal specified in the earlier questions?

[titsonritz]

The correct answer is "This is a bullshit question".

[jsbhike]

Yeah, aluminum vs. Gold would make quite the difference.

[Defaultmp3]

If the actual metal is provided, a numerical answer is pretty easy. If not, a function can still be easily generated, and may be well be sufficient for an answer.

Density = mass / volume. You have the weight, so you can get the mass assuming Earth gravity, and the volume formula is given, so it becomes density = mass / (pi * radius ^ 2 * height).

[Diamondback]

Dude, your instructor is a sadistic ass and you need to find someone else in that program to study under. :( Ah, Calculus, the reason I became a History major...

GL, OP!

[SomeOtherGuy]

Does "made of your pure metal" refer to something in a previous question on the same worksheet? If you have the density this seems straightforward. If you have no way of getting the density, then your answer would be a function of the density, e.g. Q / density.

[jpmuscle]

Needs more osmium


Sent from my iPhone using Tapatalk

[contax_shooter]

I have a feeling the previous questions would lead me to know the specific density of which “pure metal” the questions refers to. I’ll figure it out in class and report back.

Thanks all, I knew using my Post 9-11 Bill benefits towards B.A. in Gender and Women Studies is worth it.

[Dr. Bullseye]

Well, can't you get the radius if you have the circumference of the circle by multiplying it by pi to get the diameter and using half of that?

[Renegade]

Seriously this is a college level chemistry question? What retarded chemistry proff is not using metric units and makes you do conversions?


Note question also says "weighs" and not "has a mass of".

So much fail. Pretty much any answer could be correct if you vary the metal and the altitude.

Thus tt is not possible to correctly compute a height given the information in the question (we would have to know what "your pure metal" is,and at what altitude).

[Renegade]

DT......

[turnburglar]

The only part of the question I have a problem with is 'pure metal'. If that is referenced in another question then it is needed to answer this question.

This reminds me of the golden crown. A 'pure' metal has a natural density. D=M/V

Because they give you the Mass and one of the two volume constraints, you are simply solving for the last constraint.

If they did not give you the natural density of the metal, now you are solving a problem of two variables. If thats the case I cannot help you.

I took a class called chem 10 and this reminds me alot of the kind of questions asked for volumetric analysis.

[jpmuscle]

Note question also says "weighs" and not "has a mass of".

So much fail. Pretty much any answer could be correct if you vary the metal and the altitude.

Thus tt is not possible to correctly compute a height given the information in the question (we would have to know what "your pure metal" is,and at what altitude).

https://uploads.tapatalk-cdn.com/20190613/4babdb96a7d902ae8227d654b48ceab9.jpg


OP call the bluff..... it’s a test



Sent from my iPhone using Tapatalk

[MegademiC]

I would solve it with an equation using density as a variable.
The equation would be the answer because you need more info.

Id combine what you did into a single final formula by substituting the mass/sensity for volume.

[contax_shooter]

The density is provided when we were assigned the unknown “pure metal.” The lab was to calculate the density by weighing the mass and finding its volume using a graduated cylinder with water. I ended up with Ai and figured out the height of the cylinder.

In closing, the original question was missing necessary information. The lab also sucked and the instructions lacked concise detail.

Also FWIW, this chemistry professor wants us to complete all lab work in pen...

[jpmuscle]

Your chemistry professor blows


Sent from my iPhone using Tapatalk

[Diamondback]

The density is provided when we were assigned the unknown “pure metal.” The lab was to calculate the density by weighing the mass and finding its volume using a graduated cylinder with water. I ended up with Ai and figured out the height of the cylinder.

In closing, the original question was missing necessary information. The lab also sucked and the instructions lacked concise detail.

Also FWIW, this chemistry professor wants us to complete all lab work in pen...
Did I already say this prof was one SICK bitch?

[AKDoug]

The density is provided when we were assigned the unknown “pure metal.” The lab was to calculate the density by weighing the mass and finding its volume using a graduated cylinder with water. I ended up with Ai and figured out the height of the cylinder.

In closing, the original question was missing necessary information. The lab also sucked and the instructions lacked concise detail.

Also FWIW, this chemistry professor wants us to complete all lab work in pen...

I had an anatomy professor require the class final to be in Latin and in pen.. after an entire semester of requiring neither. It's often a power trip by a very unhappy person.

[26 Inf]

I had an anatomy professor require the class final to be in Latin and in pen.. after an entire semester of requiring neither. It's often a power trip by a very unhappy person.

Boy it sucked he wouldn't just let you write 'big lower leg bone' and 'little lower leg bone' but, damnit, back in the day, in real school, we read and bled latin names.

Professors are supposed to mess with you - you get in tune with them - first psychology class I took the Prof gave reading assignment in the text, but lectured outside the text. I took copious notes and studied his lecture material religiously. Exam time, you guessed it - straight from the book.

You could it the 'college experience.' I called it 'I'm so fvcking tired of you non-studying bitches whining about hard tests after I have worked a semester of 10 hour swing shifts to get the days off I needed to go to class, and listen to you smack talking my A's, you are fvcking lucky I don't carry my gun to class, I'd either suck it or shoot your narrow ass' experience.

Golly, that felt good to get off my chest. :sarcastic:

[Firefly]

Dear Diary, today I learned my wingman was close to being a disgruntled Columbine kid who hates young people

(know them feels bro :))

[Diamondback]

I already told y'all the story about Stinkerbelle and her Kobayashi Maru no-win questions that got her fumigated off campus with a literal jar of farts, right? LOL

ETA: And Fly, while I hated my high school classmates, when we had what looked like a suicide bomber (thankfully hoax, little prick trying to be cute with a visual aid for a presentation) in my homeroom class I still offered to trade my life for theirs and body-tackled the punk hoping my bloated carcass plus shoving him out the door would sufficiently smother the blast.

[AKDoug]

Boy it sucked he wouldn't just let you write 'big lower leg bone' and 'little lower leg bone' but, damnit, back in the day, in real school, we read and bled latin names.

Professors are supposed to mess with you - you get in tune with them - first psychology class I took the Prof gave reading assignment in the text, but lectured outside the text. I took copious notes and studied his lecture material religiously. Exam time, you guessed it - straight from the book.

You could it the 'college experience.' I called it 'I'm so fvcking tired of you non-studying bitches whining about hard tests after I have worked a semester of 10 hour swing shifts to get the days off I needed to go to class, and listen to you smack talking my A's, you are fvcking lucky I don't carry my gun to class, I'd either suck it or shoot your narrow ass' experience.

Golly, that felt good to get off my chest. :sarcastic:

It's OK, you're not the only guy who worked hard through college, although I was 160 credits in and I just didn't finish up. I was driving semi's for 10 hrs a day and studying at stop lights... I used to haul snow at night and study while sitting in line to fill up. It's chicken shit to teach an entire class in plain medical terms, then drop the Latin bomb on a class when the Latin names weren't even in the text book for most of the subject matter. Hell, my 1902 Textbook Of Anatomy doesn't have the Latin terms in it. Nobody calls it the vena pulmonalis dextra superior when it's the right superior pulmonary vein to the rest of the medical world.

Tibia and fibia weren't ones we had issues with.

[Alex V]

my hate of math is why I became an Architect and not a Structural Engineer. lol

[ramairthree]

Did the previous question tell you the metal?
This reads like you have been assigned a metal, say lead,
And should have a table with melting point, g/cm^3, etc.
And different people have different metals.
Classic way to curb people splitting up assignments, groups parting steps out, test cheating, etc.


They want you to w=m*g,
D=v/m,
Etc.

This may be a chemistry class, and it may be occurring in college,
But the classic first year of college chemistry would not be giving you the equation for a sphere, cylinder, etc.
You would be expected to know it.
But the writer thinks they are going to trip someone up by making them convert units-

It reads more like something a middle school science teacher without a degree in chemistry would have written. Or maybe by some Chinese grad student stuck with a Lab TA or lecture slot that hates lazy Americans not taking the real first year of inorganic chemistry.

As an undergrad I had some disdainful towards Americans Chinese, German, and Swedish professors on the bio side and some actual American loathing level Finn in calc, Swiss German in P-Chem, and Armenian in Physics. In the years after that I had a Few hardcore haughty, pretentious, contemptuous bastards here and there,
And I say this fully cognizant of the fact that I am an arrogant prick with a very high threshold to consider someone awesome at something overbearing.

You can only accomplish so much playing around with electrons anyway.
Major in physics so you can actually pull off some serious shit by messing with the nucleus.

[26 Inf]

Tibia and fibia weren't ones we had issues with.

Glad you took my rant as intended.

I have issues with the tibia and fibula, but more along the lines of 'no, you can't break just the itty bitty fibula, you get to break them both.'

160 hours/credits in and no degree, that sucks. Did you change majors?

[26 Inf]

Dear Diary, today I learned my wingman was close to being a disgruntled Columbine kid who hates young people

(know them feels bro :))

Actually, I came closest to snapping one summer session when I had an evening class with a bunch of teachers, who for some reason were taking a lit class. So not the youngest students - comparatively I was late twenties.

[AKDoug]

Glad you took my rant as intended.

I have issues with the tibia and fibula, but more along the lines of 'no, you can't break just the itty bitty fibula, you get to break them both.'

160 hours/credits in and no degree, that sucks. Did you change majors?

I changed colleges and one state college didn’t accept many credits from the other.. among other issues. Both the wife and I were only short a couple classes when she got pregnant with our first kid. Neither of us went back but we’ve had successful lives.


Sent from my iPhone using Tapatalk

[Alex V]

160 hours/credits in and no degree, that sucks. Did you change majors?

Bachelor of Architecture was 162 credits. Eff me.

[morbidbattlecry]

Did the previous question tell you the metal?
This reads like you have been assigned a metal, say lead,
And should have a table with melting point, g/cm^3, etc.
And different people have different metals.
Classic way to curb people splitting up assignments, groups parting steps out, test cheating, etc.


They want you to w=m*g,
D=v/m,
Etc.

This may be a chemistry class, and it may be occurring in college,
But the classic first year of college chemistry would not be giving you the equation for a sphere, cylinder, etc.
You would be expected to know it.
But the writer thinks they are going to trip someone up by making them convert units-

It reads more like something a middle school science teacher without a degree in chemistry would have written. Or maybe by some Chinese grad student stuck with a Lab TA or lecture slot that hates lazy Americans not taking the real first year of inorganic chemistry.

As an undergrad I had some disdainful towards Americans Chinese, German, and Swedish professors on the bio side and some actual American loathing level Finn in calc, Swiss German in P-Chem, and Armenian in Physics. In the years after that I had a Few hardcore haughty, pretentious, contemptuous bastards here and there,
And I say this fully cognizant of the fact that I am an arrogant prick with a very high threshold to consider someone awesome at something overbearing.

You can only accomplish so much playing around with electrons anyway.
Major in physics so you can actually pull off some serious shit by messing with the nucleus.

Op this type of problem you need to know the material the cylinder is made out of. Then it can be solved. What, was the metal made out of in the question before this?

[Diamondback]

Bachelor of Architecture was 162 credits. Eff me.

Offtopic: Alex, are you Residential, Commercial or Industrial? I dabbled a little in high-screwel (it was one of the few non-suck parts of those years), but it was all basic "home design" type stuff--while career track led other directions, one of the things I'd like to do someday is design and build the girlfriend a home from scratch, starting with a blank sheet of paper then personally nailing at least some of the lumber into place.