mudesi
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Tue Aug-21-07 09:26 PM
Response to Reply #89 |
| 94. If you lay it out as mutliplication of fractions... |
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Edited on Tue Aug-21-07 09:28 PM by lynyrd_skynyrd
...you'll see that you have to cancel out cm^2, because when I googled the conversion I googled feet to centimeters, and the question asks for meters.
(30.48 cm)^2 1 m^2 2.4 ft^2
------------ * ---------- *
ft^2 (100 cm)^2
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| -Any Chemistry or Math geniuses out there? |
Emit |
Aug-21-07 07:10 PM |
#0 |
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i'm not seeing where you have to be a genius to answer these |
pitohui |
Aug-21-07 07:12 PM |
#1 |
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Emit's daughter here. |
Emit |
Aug-21-07 07:15 PM |
#2 |
| -
Do you know the formula for volume? It probably starts with something like "V=....". |
BlooInBloo |
Aug-21-07 07:16 PM |
#4 |
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yes, I know the formula for volume. |
Emit |
Aug-21-07 07:19 PM |
#11 |
| -
The r is a distance |
Xipe Totec |
Aug-21-07 07:22 PM |
#19 |
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It does in a way, the value is needed to find the mass... |
karlrschneider |
Aug-21-07 07:26 PM |
#27 |
| -
Your utter mastery of this problem is hereby acknowledged. |
BlooInBloo |
Aug-21-07 07:28 PM |
#31 |
| -
you mean for the second problem? |
Xipe Totec |
Aug-21-07 07:29 PM |
#33 |
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Yes. They added that to make it a little more complex, evidently. |
karlrschneider |
Aug-21-07 07:38 PM |
#48 |
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For the second problem, |
Xipe Totec |
Aug-21-07 07:28 PM |
#30 |
| -
The first one: |
EstimatedProphet |
Aug-21-07 07:18 PM |
#10 |
| -
Sphere volume |
Canuckistanian |
Aug-21-07 07:19 PM |
#13 |
| -
Do you know the formula for the volume of a sphere? |
Xipe Totec |
Aug-21-07 07:20 PM |
#15 |
| -
yeah. |
Emit |
Aug-21-07 08:12 PM |
#68 |
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Post #30 - Solve for height (thickness) n/t |
Xipe Totec |
Aug-21-07 08:15 PM |
#69 |
| -
It's not cheating to help someone learn how to solve a problem. I'd help, but I haven't the |
poverlay |
Aug-21-07 07:16 PM |
#5 |
| -
The questions really have nothing to do with chemistry |
Canuckistanian |
Aug-21-07 07:16 PM |
#3 |
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Let's keep in mind we're talking to a kid here, folks. |
BlooInBloo |
Aug-21-07 07:17 PM |
#6 |
| -
the consequences of getting caught cheating are more serious for a kid EOM |
pitohui |
Aug-21-07 07:22 PM |
#20 |
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Oh - I just meant go easy on the "this is so easy" criticism. |
BlooInBloo |
Aug-21-07 07:27 PM |
#28 |
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ok point taken EOM |
pitohui |
Aug-21-07 07:30 PM |
#35 |
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thank you |
Emit |
Aug-21-07 07:43 PM |
#50 |
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:) Nobody needs the added "oh god - I don't want to say the wrong thing... |
BlooInBloo |
Aug-21-07 07:48 PM |
#56 |
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No algebra. A little geometry... |
karlrschneider |
Aug-21-07 07:20 PM |
#16 |
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yeah that's what i'm thinking, this is very basic math |
pitohui |
Aug-21-07 07:21 PM |
#18 |
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I was thinking that sounded like a 9th grade high school problem... |
karlrschneider |
Aug-21-07 07:28 PM |
#29 |
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Yeah, but you guys have . . |
msmcghee |
Aug-21-07 07:50 PM |
#59 |
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And circles with 400 degrees! |
karlrschneider |
Aug-21-07 07:56 PM |
#64 |
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well im not a genius and i don't know the answers... but |
mikelgb |
Aug-21-07 07:18 PM |
#7 |
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For volume of a sphere, |
Toucano |
Aug-21-07 07:18 PM |
#8 |
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right |
mikelgb |
Aug-21-07 07:26 PM |
#26 |
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It's pretty straightforward. Here's a hint |
karlrschneider |
Aug-21-07 07:18 PM |
#9 |
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okay thank you, but |
Emit |
Aug-21-07 07:25 PM |
#24 |
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You can't cube the number? It's just itself multiplied by itself 2 more times! |
karlrschneider |
Aug-21-07 07:29 PM |
#34 |
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Easy, tiger. |
BlooInBloo |
Aug-21-07 07:37 PM |
#45 |
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well of course I know how to cube a number. |
Emit |
Aug-21-07 07:38 PM |
#46 |
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you have two ways to do that |
hfojvt |
Aug-21-07 07:47 PM |
#54 |
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One cm is 10 ^ 10 A (can't recall the HTML for angstrom) so |
karlrschneider |
Aug-21-07 07:54 PM |
#61 |
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Sorry, your (mom?) originally mentioned a University class. |
karlrschneider |
Aug-21-07 07:47 PM |
#55 |
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where did you get 12? |
Emit |
Aug-21-07 07:56 PM |
#63 |
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Damn! I messed up SORRY. I wrote |
karlrschneider |
Aug-21-07 07:59 PM |
#66 |
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try this |
FogerRox |
Aug-21-07 07:19 PM |
#12 |
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An Angstrom is 10^-8 cm |
The Vinyl Ripper |
Aug-21-07 07:19 PM |
#14 |
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Oh, BTW.. |
The Vinyl Ripper |
Aug-21-07 07:23 PM |
#21 |
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That's strange, 10^-8? |
Canuckistanian |
Aug-21-07 07:28 PM |
#32 |
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Okay so it's 10^-10 METERS |
karlrschneider |
Aug-21-07 07:32 PM |
#39 |
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It's still not Engineering notation |
Canuckistanian |
Aug-21-07 07:46 PM |
#52 |
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Very small engineers do |
AngryAmish |
Aug-21-07 07:49 PM |
#57 |
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The monks, of course! |
dropkickpa |
Aug-21-07 09:23 PM |
#93 |
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It's called scientific notation and engineers most surely do use them. |
karlrschneider |
Aug-21-07 07:55 PM |
#62 |
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I know engineers use them |
Canuckistanian |
Aug-21-07 08:19 PM |
#71 |
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Maybe things have changed but it has always been standard practice to |
karlrschneider |
Aug-21-07 08:24 PM |
#76 |
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In science, yes. engineering, no. |
Canuckistanian |
Aug-21-07 08:43 PM |
#82 |
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Well, scientists have ideas and engineers turn them into reality. |
karlrschneider |
Aug-21-07 08:53 PM |
#84 |
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I agree (with your last statement) |
Canuckistanian |
Aug-21-07 09:16 PM |
#90 |
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Very well put |
sailor65 |
Aug-21-07 09:20 PM |
#92 |
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It's actually 10^-10 meter.. |
The Vinyl Ripper |
Aug-21-07 07:39 PM |
#49 |
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that's the right answer. |
Emit |
Aug-21-07 07:53 PM |
#60 |
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10^-8 centimeters/angstrom.. |
The Vinyl Ripper |
Aug-21-07 07:57 PM |
#65 |
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The angstrom isn't an SI unit |
Bill McBlueState |
Aug-21-07 08:53 PM |
#83 |
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Thanks, that's a good explanation |
Canuckistanian |
Aug-21-07 09:34 PM |
#98 |
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Yep, I did screw up... |
The Vinyl Ripper |
Aug-21-07 07:45 PM |
#51 |
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These really aren't all that bad |
dsc |
Aug-21-07 07:20 PM |
#17 |
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I tried to find the conversion on google. |
Emit |
Aug-21-07 07:30 PM |
#37 |
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You have to get all the values in the same form. You can't convert |
karlrschneider |
Aug-21-07 07:35 PM |
#42 |
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Angstrom is a unit of length, not volume.. |
The Vinyl Ripper |
Aug-21-07 07:36 PM |
#43 |
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I should have been clearer |
dsc |
Aug-21-07 07:38 PM |
#47 |
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Hints: convert angstroms to centimeters and use the standard formula for |
bluerum |
Aug-21-07 07:23 PM |
#22 |
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Uh, stoichiometry has to do with oxidation, not arithmetic... |
karlrschneider |
Aug-21-07 07:25 PM |
#23 |
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uh - ratios and balancing equations. |
bluerum |
Aug-21-07 07:26 PM |
#25 |
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I pick nits for a living. |
karlrschneider |
Aug-21-07 07:37 PM |
#44 |
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I've noticed that a lot of people who can do the math have real difficulty with word problems.. |
The Vinyl Ripper |
Aug-21-07 07:30 PM |
#36 |
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I'm pretty good at math, calculus even, but I HATE these kinds of problems: |
karlrschneider |
Aug-21-07 08:28 PM |
#77 |
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yah - d=rt problems kill a lot of people. |
BlooInBloo |
Aug-21-07 08:31 PM |
#79 |
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Yeah, solving the equations is trivial...formulating them is what's a PITA |
karlrschneider |
Aug-21-07 08:37 PM |
#80 |
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What if one... |
reichstag911 |
Aug-21-07 09:12 PM |
#88 |
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Then it becomes a question about illegal immigrants and I have absolutely no idea. |
karlrschneider |
Aug-21-07 09:31 PM |
#96 |
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The illegal immigrant... |
reichstag911 |
Aug-21-07 09:39 PM |
#99 |
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Of course! |
karlrschneider |
Aug-21-07 09:49 PM |
#101 |
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Only the ones... |
reichstag911 |
Aug-21-07 09:57 PM |
#103 |
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48 man hours for 5 rooms is 9.6 man hours/room |
The Vinyl Ripper |
Aug-21-07 09:31 PM |
#97 |
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So true! I remember from years ago when I was flying a plane for a construction company, |
karlrschneider |
Aug-21-07 09:47 PM |
#100 |
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Figuring bids is very stressful.. |
The Vinyl Ripper |
Aug-21-07 10:07 PM |
#106 |
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Reminds me of a toon from years ago: Astronauts sitting atop a rocket... |
karlrschneider |
Aug-21-07 10:11 PM |
#108 |
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Or you could skip the intermediate step... |
reichstag911 |
Aug-21-07 09:51 PM |
#102 |
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Ever heard of Trachtenberg math? |
The Vinyl Ripper |
Aug-21-07 10:14 PM |
#109 |
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Actually, no, I never had,... |
reichstag911 |
Aug-21-07 10:33 PM |
#111 |
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My dad spent time in India before WWII |
The Vinyl Ripper |
Aug-21-07 11:25 PM |
#113 |
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Number 1: |
lynyrd_skynyrd |
Aug-21-07 07:31 PM |
#38 |
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that's the answer in my book. |
Emit |
Aug-21-07 07:35 PM |
#41 |
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This is an easy mechanical trick |
lynyrd_skynyrd |
Aug-21-07 07:49 PM |
#58 |
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It's called "dimensional analysis" in math/physics/chemisty... |
BlooInBloo |
Aug-21-07 08:06 PM |
#67 |
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Oh I see you beat me to it...was out feeding the doggies. |
karlrschneider |
Aug-21-07 08:19 PM |
#72 |
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As long as somebody says it. |
BlooInBloo |
Aug-21-07 08:20 PM |
#73 |
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A nice little exemplar of dimensional analysis. |
karlrschneider |
Aug-21-07 08:18 PM |
#70 |
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Here ya go... |
fiziwig |
Aug-21-07 07:34 PM |
#40 |
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You didn't cube the exponent in the Kr problem... |
reichstag911 |
Aug-21-07 09:04 PM |
#86 |
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Umm... I was a Communications Major... |
MadMaddie |
Aug-21-07 07:46 PM |
#53 |
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Calling all plagiarists, calling all plagiarists. Do my kids homework! n/t |
L. Coyote |
Aug-21-07 08:21 PM |
#74 |
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That's clearly NOT the case -- Emit here. n/t |
Emit |
Aug-21-07 08:24 PM |
#75 |
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To avoid this kind of silliness, you may want to consider the lounge for this sort of thing... |
BlooInBloo |
Aug-21-07 08:28 PM |
#78 |
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Yes, I considered posting in the lounge, but |
Emit |
Aug-21-07 08:42 PM |
#81 |
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Some of us (I was, anyway) a little confused by your OP which at first glance |
karlrschneider |
Aug-21-07 09:10 PM |
#87 |
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i know coyote |
pitohui |
Aug-21-07 10:03 PM |
#105 |
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Number 2: |
lynyrd_skynyrd |
Aug-21-07 09:01 PM |
#85 |
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thank you sooo much. |
Emit |
Aug-21-07 09:16 PM |
#89 |
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If you lay it out as mutliplication of fractions... |
lynyrd_skynyrd |
Aug-21-07 09:26 PM |
#94 |
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In case L_S doesn't see your question, that is to convert |
karlrschneider |
Aug-21-07 09:27 PM |
#95 |
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Looks right...I didn't run the numbers but your methodology is right. Here's one for YOU |
karlrschneider |
Aug-21-07 09:18 PM |
#91 |
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About one foot, 7 inches? |
Canuckistanian |
Aug-21-07 10:00 PM |
#104 |
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5 feet/ Pi to be precise. :D Units don't matter, I can convert |
karlrschneider |
Aug-21-07 10:07 PM |
#107 |
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Pretty simple. |
reichstag911 |
Aug-21-07 10:27 PM |
#110 |
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Dimensional Analysis will set you free |
fortyfeetunder |
Aug-21-07 11:10 PM |
#112 |
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Are you serious? |
slutticus |
Aug-22-07 01:03 AM |
#114 |
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Deleted message |
Name removed |
Aug-22-07 01:05 AM |
#115 |
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She is trying to learn, not cheat |
MiniMe |
Aug-22-07 02:36 AM |
#116 |
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The point of problems like these.... |
slutticus |
Aug-23-07 11:20 AM |
#117 |
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