Monday
December 9, 2013

# Posts by Ian

Total # Posts: 187

Math 156
x1 + x2 = 77 x2 - x1 = 27 x2 = 27 + x1 x1 + (27 + x1) = 77 2 x1 = 50 x1 = 25 x2 = 52

Calculus: limits
Factor (25-t) into (5-sqrt(t)) and (5+sqrt(t)) Cancel top and bottom (5-sqrt(t) and left with lim t->25 of (5+sqrt(t)) which is 10.

Algebra
As you can see this is not factorable in your head or obvious so we have to use the Quadratic Formula: for Ax^2 + Bx + C = 0 x = ( -B / 2 A ) + or - ( sqrt (B ^ 2 - 4 x A x C) ) / 2 A So A = 1, B = 8, C = -2 -8/ 2 + or - sqrt( 64- (4 x 1 x -2)) / 2 -4 + or - Sqrt( 72 ) / 2 -4 ...

Physics
Question: Two masses 2.2 Kg and 3.2 Kg connected by a rope over a massless and frictionless pulley hang at 1.8 m above the ground on either side of the pulley. The pulley is 4.8 m above the ground. What is the maximum height that the 2.2 Kg weight will rise to after the system...

albgrea
jill is 6x, Amy is 1x 7x = \$84 x= 12, Jill \$72, Amy \$12. ------------------ x = amount in Dues 14 x + 370 - 600 = -10 14 x = 220 x = \$15.71 It doesn't work out exact due to rounding of the penny. The club would have overdrawn by 10.06 in the account.

Biology
Monomers form to combine polymers, in this case a nucleic acid. The monomer of a nucleic acid consists of a nitrogenous base, a phosphate group, and a sugar. The monomers are bound together by phosphodiester bonds. With that information, you should be able to find the answer.

chemistry
What spectra are you referring to? Mass spectroscopy, NMR, and IR are all referred to as spectra. In addition, you could be talking about fluorescence spectroscopy. How they do it varies, but they are mostly used for identification.

Chemistry II
Ok, given the volume and density, you can determine the grams of each compound present. That leaves you with needing to find the moles of acetone in the solution of 85mL, or 0.085L. Now, what quantity can you calculate that would relate grams and moles? Think periodic table. O...

I believe I answered this elsewhere are well, but... Weight and mass are two different things. Mass is a measure of the amount of matter contained in something, weight is a measure of force (F-ma). Doubling the gravity would certainly affect the weight, but do you think it wou...

chemistry
Mass and weight are two different things. It is true that the object would weigh twice as much, but the mass would remain the same, as it is independent of gravity. Think of mass as a measure of the amount of matter in an object. Weight is a measure of force (F=ma). I agree on...

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