Wednesday
October 1, 2014

Posts by Damon


Total # Posts: 18,762

chem
the gas is still about 80% N2 so 8 atm It would also be 2 atm O2 instead of 0.20 atm O2 or ten times the O2 pressure. Both the high partial pressure of N2 and of O2 cause problems for divers and for deep diving for extended times mixtures with lower O2 content and Helium ...
August 25, 2014

algebra
draw a number line put a dot at +7 go left negative one when you go left negative, you go right
August 25, 2014

math
four choices for the first three for the second two for the third one for the fourth 4*3*2*1 = 24 usually this is called permutations and is written as n! where n! = n * (n-1) * (n-2) ....*1
August 25, 2014

Agebra
you did
August 25, 2014

Physical Science
LOL You only have two significant figures in 3.0 365.25 * 3.0 = 1095.75 which to two sig figs is 11*10^2
August 25, 2014

Physical Science
100 * .2/37 100 * .3/37
August 25, 2014

geography
because it is big and you only see a tiny bit of the surface of the sphere because you are so close to the surface like an ant on a huge round balloon. If you get far away, like in an orbiting space station, you can see the curvature.
August 25, 2014

business math
markup = 25,869.57 - 11,900 = 13,969.57 13,969.57 * 100 / 25,869.57 = 54
August 25, 2014

phychics
Moreover for the sake of us physicists, please spell physics.
August 25, 2014

phychics - typos
what is the friction on this friction track you gave the speed at the top - why do you ask for it? If it is another hill, what is the height?
August 25, 2014

Physical Science
I do not know because I do not know the true value. However I can give the percentage range from the average of the two. (37.2+36.7)/2 = 36.95 difference = +/- 0.25 100* .25/36.95 = + or - .68%
August 25, 2014

Ed Tech
I have a sneaking suspicion that they want antivirus software if they are downloading stuff.
August 25, 2014

Math
The round one with red and blue and white stripes
August 25, 2014

Calculus
p = 2L + 2 w w = 64/L so p = 2L +128/L w can range from 0 to L if w = 0, L ---->oo and p -->oo if w = L, L = w =8 and p = 4*8 = 32 so 32 </= p </= oo
August 25, 2014

Math
I suspect you mean but did not type: 5x^7/(97x+9) and not (5x^7/97x)+9 which is too easy If my guess is right and your use of order of operations and parentheses is wrong then use (bottom derivative top - top derivative bottom )/ bottom^2 [(97x+9)35x^6 - 5x^7((97)]/(97x+9)^2...
August 25, 2014

Calculus
Kadudu, see where you posted below
August 25, 2014

Calculus
sin 2x = 2 sin x cos x so 6 sin x cos x = 3 cos x right off, if cos x = 0, we have solutions. That is when x = pi/2 and x = 3 pi/2 also when sin x=1/2 that is x = pi/6 and x = 5 pi/6
August 25, 2014

Physics
I suspect you mean meters not miles but whatever s = speed horizontal: u = s cos 30 = .866 s if t = time rising, then 2t = time in air 15,000 = u *2 t = 1.732 s t so s t = 8660 vertical Vi = s sin 30 = .5 s v = Vi - 9.81 t v = 0 at t (the top) 0 = .5s - 9.81 t t = .05096 s so ...
August 25, 2014

Physics
If it takes 5 seconds to cover that distance you will have to throw it just about straight up so it will stay up five seconds ! u = constant horizontal speed = 10m/5s = 2 meters/second in 5 seconds it goes up 3 meters 3 = Vi t - 4.9 t^2 3 = Vi(5) = 4.9(25) 3 = 5 Vi - 122.5 Vi...
August 25, 2014

physics
You can not think of any at all?
August 25, 2014

Math
A 1/15 wall / day B 1/20 wall / day together 1/15 + 1/20 = 7/60 wall/day times 4 days = 28/60 = 7/15 wall
August 24, 2014

Math
been there, done that Masood + 1.2 Masood = 550 2.2 Masood = 550 masood = 250
August 24, 2014

I think Chemistry
Sorry, can not help
August 24, 2014

math
area of base = pi r^2 = 35^2 pi volume = height*base area = 50 * 35^2 pi ft^3 gallons = 50 * 35^2 * pi * 7.5
August 24, 2014

PHY SCI
Ac = v^2/R R = 500 meters v = 90 km/h * 1000 meters/km * 1 hr/3600 s
August 24, 2014

PHY SCI
Oh my, I suppose I will use feet and inches and miles and pounds and g = 32 ft/s^2 s = speed in ft/s u = horizontal speed = s cos 42 = .743 s Vi = s sin 42 = .669 s t = time rising 2 t = time in air 300 feet = 2u t = 1.49 s t v = Vi - 32 t 0 = .669 s - 32 t t = .0209 s so 300...
August 24, 2014

Math
7/15
August 24, 2014

physics
I am going to make a lot of symmetry assumptions and assume these are hockey puck with no rotational energy initial: V = vx i call ball mass = 1 kg momentum = vx i energy = .5 vx^2 Final ball 1 V1 = V1x i assuming symmetry so V1y = 0 momentum = V1x i energy = .5 Vix^2 ball 2 ...
August 24, 2014

hurestics
b+t = 74 3 t - 2 b = 87 3(74-b) -2b = 87 222 - 3 b - 2b = 87 5 b = 135 b = 27
August 24, 2014

hurestics
he had 27 available he spent 2 on 2 pencils so they were a dollar each
August 24, 2014

MATHS LAH
42 + 4 7(6) + 4(1)
August 24, 2014

Calculus
3 d/dx sin (4x) note: d/dx sin u = cos u * du/dx 3 cos (4x) * d/dx (4x) 3 cos (4x) * 4 12 cos(4x)
August 24, 2014

Phsical Science
The only real reason to stick with it in the US is the cost of conversion: http://education-portal.com/academy/lesson/english-system-of-measurement-definition-history-advantages-disadvantages.html#lesson
August 23, 2014

Algebra
yes
August 23, 2014

Algebra
yes
August 23, 2014

Algebra
I gather you mean: (2x+3)/4 or 2 x + 3 --------- 4 If so, yes
August 23, 2014

chemistry
MgCl2 HUH? Mg is +2 and Cl is -1
August 23, 2014

Algebra
yes, that is just a reversal of order which is commutative. It will work until you get to matrix multiplication.
August 23, 2014

Algebra
agree
August 23, 2014

American Government
You are welcome. I think on the average over the range of issues the bar has more influence. I personally resent all of these organizations and their influence.
August 23, 2014

American Government
I decline to give my opinion because I consider it embarrassing.
August 23, 2014

chemistry
you only have one H2O on the sulfate so I would call it a monohydrate Are you sure it is not 7H2O ???? instead of /H2O ???? the would make it D
August 23, 2014

chemistry
B is wildly wrong !!! C is also Wildly wrong for the same reason. Hydrogen reacts. Helium reacts with essentially nothing because that first level is full of its two electrons D is just crazy. Helium is our second element with two protons and two electrons.
August 23, 2014

chemistry
mass does not change in a chemical reaction
August 23, 2014

Government
You are welcome :)
August 23, 2014

Government
http://www.washingtonpost.com/wp-dyn/content/article/2009/07/05/AR2009070502770.html
August 23, 2014

Physics
does not matter what the charge on B is, call it -1 and call k = 1 To the left 2/(1)^2 + 1/(1)^2 = 3/1 to the left so we need 3 to the right Qd/4^2 = 3 Qd = 16*3 = 48
August 23, 2014

College Algebra 1
10 x^2 - 41 x + 21 = 0 (5 3) (2 7) ??? yes, 6 and 35 (5x-3)(2x-7) = 0 x = 3/5 or x = 7/2
August 23, 2014

math
yes
August 23, 2014

math
hint find common factor
August 23, 2014

math
you have 4 choices for the first digit 3 for the second 2 for the third left with one 4*3*2 = 24
August 23, 2014

science
I do not believe it can. The only thing I can think of is that you are dealing with two different isotopes of silver.(107 grams/mol and 109 grams/mol)
August 23, 2014

math
a = b/2 b = 2 a 5 b = 10 a half of 5 b = 5 a
August 23, 2014

Precal
Use your calculator cos 75 = cos 83 = cos 91 = cos 99 = cos 107 = cos 115 = cos 123 = cos 131 = cos 139 - cos 147 = now add to get a :)
August 23, 2014

statistics
http://www.alcula.com/calculators/statistics/correlation-coefficient/ http://www.alcula.com/calculators/statistics/linear-regression/
August 23, 2014

statistics
How about trying yourself instead of asking us to do them all?
August 23, 2014

Algebra
You are welcome :)
August 23, 2014

Algebra
9^ means 9^.5 or 9^2 or 9^.7315 or what? from your answer I am guessing 9^2 11 (81 - 25) /(12) = 51 1/3 yes
August 23, 2014

Algebra
Correct
August 23, 2014

Algebra
You are welcome.
August 23, 2014

Algebra
Yes
August 23, 2014

Algebra
yes, order does not matter.
August 23, 2014

Earth Science Continued
For 1 I would have picked B but if B is wrong go with D 3. B yes 5. C yes, it is an example of the theory in action
August 23, 2014

College Algebra 1
1 = 1^2 25 z^2 = (5z)^2 so (1-5z)(1+5z)
August 23, 2014

Algebra
well, yes, but they asked for the expression: $25 + 6($14) not the result: answer = $109
August 23, 2014

Algebra
You are welcome :)
August 23, 2014

Algebra
yes
August 23, 2014

Pre-cal
one way: cos 75 + cos 83 + .....cos 147 = a sin 75 + sin 83 + .... sin 147 = b tan theta = b/a r = sqrt (a^2+b^2)
August 23, 2014

Algebra
.01 x + .04 (5-x) = .02 (5)
August 23, 2014

nitw - Incomplete question
You need the coef of friction or the time or the deceleration
August 23, 2014

American Constitutional Law
I assume we are talking about the national guard which is usually run by the state but can be called up by the federal government if needed. Therefore I think C see: http://www.arng.army.mil/aboutus/history/Pages/ConstitutionalCharteroftheGuard.aspx
August 23, 2014

American Constitution Law
see answer above http://www.arng.army.mil/aboutus/history/Pages/ConstitutionalCharteroftheGuard.aspx
August 23, 2014

Math
1 Mas + 1.2 Mas = 550 Mas = 550 / 2.2
August 23, 2014

physics
x axis from center A to center B Ball A before Vx = 10 cos 60 = 5 sqrt 3 Vy = -10 sin 60 = -5 let m = 1 kg Ke = (1/2)(100) = 50 Joules Ball B before Vx = 0 and Vy = 0 and Ke = 0 Ball 1 after Vx1 Vy1 Ke1 =(1/2)(Vx1^2+Vy1^2) Ball 2 after Vx2 Vy2 (has no Vy because hit in x ...
August 23, 2014

physics
Negative wavelets. The original Huygens Principle does not clearly account for the wave direction. The important point is that the wavelet phase must be considered. However, the diagram below shows that additional negative wavelets easily solve this problem. The use of black ...
August 23, 2014

PHYSICS
F cos 30 = 30
August 23, 2014

Physics
F = G M1 M2 / d^2
August 23, 2014

maths
6/20 = 30/100
August 23, 2014

Math
multiply both sides by 6 y 8 + 15 = 6 y 6 y = 23 y = 23/15
August 23, 2014

algebra
I bet you mean 5 x^2 / (x^3-x^2) 5 x^2 /[ x^2(x-1) ] 5 / (x-1)
August 23, 2014

math
5^2 = 2.5^2 + h^2 h^2 = 25 - 6.25
August 23, 2014

science
I have no idea. There are two naturally occurring isotopes of silver, 107 and 109, but that is not enough difference.
August 23, 2014

Algebra
If you meant to type (3/5)^3 then you are right.
August 23, 2014

math
pi r^2 - 9 4 pi - 9 about 3.566370614
August 22, 2014

I have a pretty hard one
5600/27 is a common fraction
August 22, 2014

I have a pretty hard one
there is a trick to finding the fraction for a repeating decimal by the way. Google repeating decimal in this case for example .407407407 ---- 1000 x = 407.407407407..... x = .407407407.... so 999x = 407 x = 407/999 = 11/27
August 22, 2014

I have a pretty hard one
oh 70 / (45/100 *75/100) 70 * 100 *100 / (45 * 75) 14 * 20 * 100 / (9 * 15) 14 * 4 * 100 / (9 * 3) 5600 / 27 = 207 11/27 because 207 * 27 = 5589 and 5600 - 5589 = 11
August 22, 2014

I have a pretty hard one
.45 * .75 * n = 70 n = 70/ (.45*.75) n = 70 / .3375
August 22, 2014

math
.24 n = 45 so n = 45/.24
August 22, 2014

Physical science
http://dwb4.unl.edu/Chem/CHEM869R/CHEM869RLinks/www.nidlink.com/7Ejfromm/arrhenius.htm
August 22, 2014

math mental math
as I said down below 17 - 2 + 2 + 38 = 15 + 40
August 22, 2014

physics
been there, done that
August 22, 2014

physics
54 km/h * (1 h/3600 s)*(1000 m/km) = 15 m/s 15 m/s / 5 s = 3 m/s^2 (1/2) m v^2 Joules (1/2) m v^2 Joules/15seconds ---> Watts
August 22, 2014

math
DRAW A PICTURE The change of an integral at the right hand limit is the area defined by the height , f(x), times dx In other words the answer is f(2sqrt2) 2sqrt [2sqrt 2)^2+1] = 2sqrt(8+1) =2* 3
August 22, 2014

MATH HELP
17 - 2 + 2 + 38 = 15 + 40
August 22, 2014

MATH HELP
I would add 15 to 40
August 22, 2014

Related rates math in calculus
L = 18-2x w = 18-2x h = x V = x(18-2x)^2 dV/dx = 0 for max or min 0 = x (2)(18-2x)(-2) + 1 (18-2x)^2 0 = -4x (18-2x) + 324 - 72 x + 4 x^2 0 = -72 x + 8 x^2 + 324 -72 x + 4 x^2 0 = 12 x^2 - 144 x + 324 0 = x^2 - 12 x + 27 0 = (x-3)(x-9) x = 3 or 9 but 9 will not work (is V=0) ...
August 22, 2014

math
You are welcome :)
August 21, 2014

math
100,000 to 999,999 is one hundred thousand to nine hundred and ninety nine thousand nine hundred and ninety nine.
August 21, 2014

Earth Science
He said .... then .... experimentation supported Amit agrees :)
August 21, 2014

Pages: <<Prev | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | Next>>

Search
Members