psi20

Draw a circle with a radius of .25m (or draw a scaled down version of it) Firstly, 1 revolution means going around the circle once. Going around the circle once means traveling its circumference. The circumference of a circle is 2*pi*1/4 m Secondly, the blade goes at 3700 revolutions per minute. Therefore, the blade goes 3700 (2*pi*.25m)/ 1 minute Just convert by multiplying it by (1 minute / 60 seconds) to get m/s units. Take 2 significant digits.

Draw a circle with a radius of .25m (or draw a scaled down version of it) Firstly, 1 revolution means going around the circle once. Going around the circle once means traveling its circumference. The circumference of a circle is 2*pi*1/4 m Secondly, the blade goes at 3700 revolutions per minute. Therefore, the blade goes 3700 (2*pi*.25m)/ 1 minute Just convert by multiplying it by (1 minute / 60 seconds) to get m/s units. Take 2 significant digits.

----++++ is the same as ++++---- , since it's a circular permutation. In circular permutations, matt grime's suggestion of placing one thing fixed and change the order of the objects around it.

----++++ is the same as ++++---- , since it's a circular permutation. In circular permutations, matt grime's suggestion of placing one thing fixed and change the order of the objects around it.

"Because there are indistinguishable objects it works somewhat like a combination. The formula (I think) for indistinguishable permutations is n!/x! where x is the number of indistinguishable objects. You are taking away the permutations that look the same. eg: xxy xyx yxx Its 3!/2!=3 not 3!=6 because xxy and xxy are the same even if the x's switch." That's true for linear permutations that repeat, I believe. I'm not sure it applies to circular permutations that repeat.

"Because there are indistinguishable objects it works somewhat like a combination. The formula (I think) for indistinguishable permutations is n!/x! where x is the number of indistinguishable objects. You are taking away the permutations that look the same. eg: xxy xyx yxx Its 3!/2!=3 not 3!=6 because xxy and xxy are the same even if the x's switch." That's true for linear permutations that repeat, I believe. I'm not sure it applies to circular permutations that repeat.

Sorry Deified that we're not helping that much. But I think there'd be more than just the 6 above. +---++-+ +---+-++ +---+++- ++-++---

Sorry Deified that we're not helping that much. But I think there'd be more than just the 6 above. +---++-+ +---+-++ +---+++- ++-++---

What is your formula? What does is it supposed to tell you?

What is your formula? What does is it supposed to tell you?

Well, nevermind, we didn't tackle a problem like that. We did a one where there was an alternating pattern, meaning postive then negative then positive... in a circle. Does your problem have alternating positive/negative particles? I lost the formula for alternating patterns on circular permutations. However, I do remember one thing. Don't trust formulas , especially since mathematicians debate over this area of math.

Well, nevermind, we didn't tackle a problem like that. We did a one where there was an alternating pattern, meaning postive then negative then positive... in a circle. Does your problem have alternating positive/negative particles? I lost the formula for alternating patterns on circular permutations. However, I do remember one thing. Don't trust formulas , especially since mathematicians debate over this area of math.

Yeah, this is the problem my teacher and I also tackled. Let me look up the formula we found independently.

Yeah, this is the problem my teacher and I also tackled. Let me look up the formula we found independently.

the French usually put the noun first, then the adjectives.

the French usually put the noun first, then the adjectives.

How do you say UFO in French? OUF?

How do you say UFO in French? OUF?

What's it mean by "The vector sum of any two of three forcecs in equilibrium must be equal and opposite to the third force"?

You're 5 feet away from your bathroom mirror. You stare in the mirror at an object 2 feet behind you. Are your eyes contracting as if you're looking at an object 12 feet away?

http://news.yahoo.com/news?tmpl=story&u=/ap/20041114/ap_on_bi_ge/tobacco_trial this is some-what related to this thread

Who raises the prices of cigarettes and where does that money go, exactly?

Yeah, I got the German too. I was thinking to myself while I was doing the puzzle, "Shoot, green is left of white? What if Einstein was walking around the houses and saw the the backsides of the houses (meaning viewed from the front side would be the opposite)? That would screw me up!"

But is it alright to put drugs into someone else's body? Doesn't second-hand smoke kill a lot of people?

Radians in trigonometry are used in trignometric graphs, sectors, angular speed, arc lengths, polar graphs, etc. They might also be a mnemonic thing. In the unit circle, the angles with a denominator of 4 have sqrt 2 / 2 (2*2 = 4)as their coordinates and you have to think which quadrant they're in. denominators of 6 have sqrt 3 / 2 as x-coordinate (3*2 = 6) . denominators of 3 have 1/2 as x-coordinate (1+2=3?). That may/may not be a convienience. I'm not good with mnemonics, though, so that doesn't apply to me.