Thursday
March 23, 2017

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Posts by Damon

Total # Posts: 29,612

wrong I think
V = Vi (0.82)^t not times t .75 = .82^t log .75 = t log .82 t = log.75 / log.82 = 1.45 years
March 23, 2017

angular accleration
Hey, I did one for you. Now you try.
March 23, 2017

angular accleration
150 - 120 = 30 rpm 30 *2pi/60 = pi radians/second = change in angular velocity pi/30 = angular acceleration in radians/second
March 23, 2017

MATH: Check my answers | HELP ASAP!!
12*23 = 276 yes
March 23, 2017

US History UGGGH
I am inclined to agree with you on d.
March 23, 2017

Maths
say tthey startedd east east distance = 150 + 120 cos 45 north distance = 120 sin 45 hypotenuse = sqrt[(150+120cos45)^2+(120sin 45)^2]
March 23, 2017

Maths
LOL try a+b+c = 3 try a = 1 b+c = 2 let b= 1 and c = 1 (1+1+1+1)(1+1+1+1) = 4*4 = 16
March 23, 2017

Physics
8.99*10^9[-32*10^-12 / 5.76*10^-4] = -49.9 *10^1 = -500 agree force is attractive (opposite signs). I guess you could call that negative.
March 23, 2017

Physics
v^2/R = 100/80
March 22, 2017

science, maths
the work done on a test charge q moving in an electric field is the force q*E times the distance moved IN THE DIRECTION of the force. The only direction that has NO component of force in the direction of motion is in the direction perpendicular to the force. The force is in ...
March 20, 2017

math
small = 47/22 - 11/22 = 36/22 = 18/11 large = small + 40/11
March 19, 2017

modern physics
I looked through this list of questions. They are cookbook questions and the recipes are in the student's text. for example if we know a half life in seconds and it is exponential decay then amount = original amount *e^-kt if amount/original amount = 1/2 then 1/2 = e^-kT ...
March 19, 2017

math question
.75*2400 = 1800 = value after first year .25*1800 = 450
March 19, 2017

American Government
Did Washington have a Health and Human Services department? A housing and Urban Development? .....
March 18, 2017

maths period help
when theta/4 = 2 pi you have gone once around the circle theta/4 = 2 pi theta = 8 pi
March 18, 2017

physics 1
Well, whatever we do we will be wrong because when you have a ship in water there is an effect called usually "added mass" due to having to accelerate water around the ship when you accelerate the ship. However your book did not know that so: F = m a -8*10^4 = 3.6*10...
March 18, 2017

Physics
The same as the original momentum.
March 18, 2017

Physics
sqrt(450^2+725^2) Hey - you are asking the same question over and over with different numbers.
March 18, 2017

math
864 - 702 = 162 You calculated how much she paid for the good deal but you were asked how much she SAVED.
March 18, 2017

math
75% off is 25% = 1/4 full price = 200*4 * 1.08 deal price = (200*3 + 50) * 1.08 subtract
March 18, 2017

Chemistry
17600 = 4.184 * 350 (T-24.1)
March 18, 2017

Math
70 (1- 1/14) = 70 (13/14)
March 18, 2017

sorry, misleading word
gain per period = 1+r not per year gain per year = (1+r)^n gain per 6 years = (1+r)^6n
March 18, 2017

math
r = .035/n where n = times per year yearly gain = 1+r final amount = 2750 * (1+r)^6n so for example for 1000 times per year: r = .035/1000 = .000035 1+r = 1.000035 and amount = 2750 *(1.000035)^6000 = $ 3392.60
March 18, 2017

incomplete statement
I assume it is sticking out horizontal from wall. I assume the weight is in the middle I assume the string is vertical, if not divide T by cos angle where angle is angle of string from vertical. moments about hinge 100 (1/2) -T (1) = 0 T = 50 N then you also need 50 N up at ...
March 16, 2017

physics
I mean I often answer physics questions here and you saved me a lot of work :)
March 16, 2017

physics
That was heroic Elsa tony !
March 16, 2017

sir damon steve damon damon help maths
integral T dt = .1 t^3 + 2 t^2 + 10 t at t = 12 = .1(1728) + 2(144) + 120 at t = 9 = .1(729) + 2(81) + 90 subtract value at 9 from value at 12 divide by (12-9)
March 15, 2017

Algebra
If 2x+1 = 5 then x = 4/2
March 15, 2017

Social Studies 6th grade
The smallpox story was standard until very recently.
March 15, 2017

Social Studies 6th grade
It is traditionally believed that smallpox was the killer, but recently that hypothesis has been challenged and cycles of drought and rainfall leading to waves of rodents carrying indigenous fevers might be the culprit. See: http://blogs.plos.org/publichealth/2013/07/30/guest-...
March 15, 2017

calculus
integral of F dx assuming that F is in exactly the direction of motion 7 integral dx/x^2 at 19 - at 1 -7 (1/x) at 19 - at 1 7/1 - 7/19 = 12/19
March 15, 2017

Social Studies
If you see a solution to the problem in that paragraph, you are magical. I have no doubt about the different religions, but by the way wonder about the claim of ethnic differences. What does that mean?
March 14, 2017

Science
1. right 2. right 3. WRONG X has greater energy/freequency, just below Gamma
March 14, 2017

History
...and this survivor of the Pearl Harbor attack is not happy either.
March 14, 2017

History
Of course it is correct! The others are just plain crazy. Admiral Mitscher is upset with you.
March 14, 2017

Physics
sorry 3/2 the way it is phrased
March 14, 2017

Physics
rotational: omega = v/r = angular velocity I = (2/3) m r^2 Ke = (1/2)I omega^2 = (1/2)m (2/3)mr^2 v^2/r^2 = (1/2)m (2/3)v^2 but translational Ke = (1/2) m v^2 so 2/3
March 14, 2017

chemistry
Do you have Google where you live?
March 14, 2017

Chemistry
delta U = heat in - work out delta U = Q - W in physics HOWEVER chem texts sometimes use delta U = Q + W with W = work IN so maybe that is what you have here. in that case if delta U is - then Q < -W heat in less than work out which is c)
March 11, 2017

Math
LOL :)
March 11, 2017

Math
-4 (4) < 4x < 5(4) -16 < 4x < 20 -16 + 5 < 4x+5 < 20 + 5 -11 < 4x+5 < 25
March 11, 2017

Math
proof read perhaps 30% of x is 87 ? .3 x = 87 x = 87/.3 = 870/3
March 11, 2017

Chemistry
heat comes out when you convert water to ice
March 11, 2017

physics!
Ac = v^2/R = omega^2 R well circumference = 2 pi R = 22.6 pi meters does that circumference in 16.6 seconds so v = 22.6 pi/16.6 meters/second so Ac = (22 pi/16.6)^2 / 11.3 the mass has nothing to do with it unless you want the tension in a string :)
March 11, 2017

Physics
leg of right triangle 5^2 + x^2 = 169 x^2 = 144 x = 12 this is a 5, 12, 13 right triangle
March 11, 2017

Accelerated Math
c = 7 s c depends on s
March 10, 2017

math
0.80 p = 65 p = 65/.8 = 650/8
March 10, 2017

math
(568+102-57) * 1.10 =
March 10, 2017

All subjects
EXPRESS all lengths in METERS, not cm for example I do not believe your well is radius of 3 cm Volume of well = V = pi r^2 * 21 Q = flow rate Q = width * depth * 2 m/s V = flow rate Q * time t
March 10, 2017

Chemistry
humm 2H2 + O2 ---> 2H2O O is 16 g/mol so O2 is 32 grams/mol so we have 384/32 = 12 mols of O2 That will yield 2*12 = 24 mols of H2O a mol of H2O is 2+16 = 18 grams/mol so 24 mols = 24*18 = 432 grams water
March 9, 2017

calculus
F = k x 4 = k (.1) k = 40 pounds/foot Energy = Work = (1/2) k x^2 = (1/2)(40)(.6)^2 foot pounds to get that with calculus work in = F dx = k x dx = k x^2/2 + constant if W = 0 when x = 0 than the constant is 0 so W = (1/2) k x^2
March 9, 2017

Physics
the wavelength is determined by the difference between high and low energy levels in the material emitting the photons.
March 9, 2017

Hope someone know this Math
The original reply that the terms are irrational is rational.
March 9, 2017

Math - Calculus
only if it is horizontal there. http://www.google.com/search?q=critical+point+of+function&ie=utf-8&oe=utf-8
March 9, 2017

Math
but I think you wanted GREEN (9/14) (70) = 45
March 9, 2017

Math
now try that 25/70 = ? 5/14 whew !!!
March 9, 2017

Math
another way multiply both sidees of this equation by the least common multiple of 14 and 70 I think 140 is close enough 140(5/14) = 140(x/70) 10 * 5 = 2 * x 5 * 5 = x 25 = x
March 9, 2017

math
yes
March 9, 2017

math
The area is four times the original and no I am retired.
March 9, 2017

math
double the scale of a two dimensional figure and area is multiplied by 2^2 = 4 times eg rectangle 2 x * 2 y = 2^2 x y = 4 x y
March 9, 2017

Math
multiply both sides by 100x 5 x = 300 x = 60 now try that 3/60 = 30/600 = 5/100 yes
March 9, 2017

Math
that makes NO SENSE. You have no unknown there and it is wrong anyway 5/100 = 0.05 30/6 = 5 they are not the same you must have an x somewhere
March 9, 2017

Math
your second problem statement makes no sense.
March 9, 2017

Math
multiply both sides by 100 x 100 x (3/100) = 100 x (30/x) 3 x = 3,000 x = 1,000 or simply multiply the left side by 10/10 30/1,000 = 30/x :)
March 9, 2017

PE
That is correct if your order is from simple to complex. The original question was from complex to simple
March 9, 2017

PE
most complex ---> simplest systems -> organs->tissues->cells
March 9, 2017

PE
ah, most complex is supposed to be first I think.
March 9, 2017

math
the area of a trapezoid is the average length of top and bottom (L1+L2)/2 times the height http://www.google.com/search?q=area+of+trapezoid&ie=utf-8&oe=utf-8
March 9, 2017

Physics
q * E charge times electrical field strength proportional to charge
March 9, 2017

Physics
k Q1 Q2 / d^2 charge and distance
March 9, 2017

Physics
no
March 9, 2017

Algebra2
(x-0)^2 = 4a(y-0) a = distance vertex to focus or to directrix if a is +, parabola holds water here directrix is below vertex, so a is +5 x^2 = 20 y
March 8, 2017

Chemistry
.055*.5 = .0275 mols of H2CO3 You need half as many mols of Fe2SiO4 .5*.0275 = .01375 mols now add up gram molecular mass of Fe+Fe+Si+16+16+16+16 to get grams/mol and multiply by .01375 to get grams
March 8, 2017

Physics
yes
March 8, 2017

Physics
http://en.wikipedia.org/wiki/Interference_(wave_propagation) note: [2A] cos (kx- wt) cos(phase angle/2)
March 8, 2017

math
By up I suppose you mean up in y because you have no z coordinate. Just increase all the y locations by 3 and leave the x coordinates the same. eg: S(4,4)
March 8, 2017

no idea
do not see picture
March 8, 2017

physics
Spaceship 2 has it all:) 300*0 = 0 300*4 = 1,200 kg m/s
March 8, 2017

physics, vectors
If a unit vector in the x or east direction is i, the y direction or north is j, and the z direction or up is k, then: momentum vector=12,000 i + 0 j + 0 k magnitude = sqrt (12,000^2+0^2+0^2) =12,000 kg m/s
March 8, 2017

Physics
200(1.5) = .5 w w = 600 Newtons
March 8, 2017

incomplete
What is the question? a = (13.4-0)/5 m/s^2 = r*alpha v = 0 + a t = r*omega d = 0 + 0t + (1/2)(5)t^2
March 7, 2017

Hot math questions
LOL :)
March 7, 2017

English
well, "he" is a person :) Had got no business to be there After the day was done — "It's very rude of him," she said, "To come and spoil the fun." So who does she think the night belongs to?
March 7, 2017

Algebra math 150
height times average of a and b
March 7, 2017

Physics
The increase in gravitational potential energy = m g h where h is the HEIGHT change, the increase in distance from the center of the earth. Work = distance times force IN THE DIRECTION OF MOTION 200 * 4 = 800 Joules alternatively force component up slope * 4/sin 20 = 200 sin ...
March 7, 2017

math 1
when you typed 1/3x + 4 I assume you mean (1/3)x + 4 and not 1/(3x) + 4 or 1/(3x+4) y = (8-x) so (8-x) = (1/3) x + 4 24 - 3 x = x + 12 4 x = 12 x = 3
March 6, 2017

Math
a = 3 m b = 8 m c = 6b = 48 m a/c = 3 m/ 48 m = 1/16
March 6, 2017

Chemistry
(a) but when she opens the bottle the air inside is still at 1 atm so must escape out the open top--> whoosh !
March 6, 2017

math 73
.22 c + .02 m = .04(20) c + m = 20 so m = (20-c) so .22 c +.02(20-c) = .8
March 6, 2017

Physics
omega is angular velocity in radians/second omega R = 5 m/s so omega = 5/.3 = 16.7 radians/second Ke = (1/2)I omega^2
March 6, 2017

Math
You are welcome.
March 6, 2017

Math
Make a number line on a piece of paper. Draw the situation on it. Left 8 from -20 -20-8 = -28
March 6, 2017

you need limits
infinite as stated
March 6, 2017

Calculus
assuming that your answer is correct dy/dx = x^2 e^(x^3/3) but e^(x^3/3) = y-2 so dy/dx = x^2 (y-2) hummm I'll try dy/(y-1) = x^2 dx ln(y-1)= x^3/3 + c (y-1) = e^[x^3/3 + c] y-1 = e^(x^3/3) e^c y-1 = Ce^(x^3/3) y = 1 + Ce^(x^3/3) 3 = 1 + C C = 2 so y = 1 + 2e^(x^3/3)
March 6, 2017

Science
1. wrong 2. right 3. wrong 4. both mass and distance G M1M2/d^2 5. both (or they would bash each other) 6. right 7. It is near the poles that you have darkness at noon when the sun is above the other Capricorn or Cancer :) 8.Right 9. WRONG!!!! (google moon landing) 10. Wrong...
March 6, 2017

English
Nope. None of them are.
March 6, 2017

Social studies
Nope, remember that 3/5 of a person thing?
March 6, 2017

Math
(1/4) 16 = 4 lettuce (1/8) 16 = 2 punpkin (1/2) 16 = 8 red tulips 4+2+8 = 14 16-14 = 2 rows of carrots
March 5, 2017

math
recursive means you get the value from an earlier value or values. An+1 = An + 5 for example Explicit means you calculate it without reference to the former value A = 5 n for example
March 5, 2017

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