Monday
February 20, 2017

Posts by Damon

Total # Posts: 29,370

Math PROBABILITY part 1
4/9 + 7/18 + x = 18/18 15/18 + x = 18/18 x = 3/18 = 1/6 which is a
February 6, 2017

Math PROBABILITY part 1
yes, 5/8 yes 4/9 next, problems
February 6, 2017

PHYSICS
1.3*.4 = .52 .7*.4 = .28 total distance = .8 total time = 1.1 av speed = .8/1.1 = .73 m/s
February 6, 2017

math plzzz help quick
You are welcome.
February 6, 2017

math plzzz help quick
2x = y-14 so -4x = -2(y-14) = -2y + 28 use that for -4x in equation 2 (-2y+28) - y = 4 -3 y = -24
February 6, 2017

physics
Vi = 14 a = -3.3 v = Vi + a t at stop, v = 0 0 = 14 - 3.3 t 3.3 t = 14 for half time if t = 7/3.3 v = 14 - 3.3 (7/3.3) v = 14 - 7 = 7 on the nose then
February 6, 2017

math plzzz help quick
yes
February 6, 2017

math plzzz help quick
rewrite first one x = y -11 use that for x in the second one y + 7 = -2(y-11) y + 7 = -2 y + 22 3 y = 15 y = 5
February 6, 2017

Algebra
divide by factor (x+2) (x^3 – 3x^2 – 6x + 8)/(x+2) = x^2-5x+4 which is (x-4)(x-1) so 4 and 1
February 6, 2017

electricity
15 = 60R/(60+R) 900 + 15 R = 60 R 45 R = 900
February 6, 2017

Physics
m v^2/R = 600 0.8 v^2/0.9 = 600
February 6, 2017

modern worl studies connexus
6 NO WAY!!! 9 Canada has its own monarch ??? First I heard of it, and I row against them up there in Nova Scotia.
February 6, 2017

math
4 works for 1, 4 or 4 people 6 works for 1, 2 , 3 or 6 people
February 5, 2017

math
READ That was the CHECK James is 48
February 5, 2017

math
Jo + 5 = Ja/3 Jo - 3 = Ja/6 -------------- subtract 0 + 8 = Ja(1/3 - 1/6) Ja (2/6-1/6) = 8 Ja = 6*8 = 48 =========================== check Ja = 48 Jo = 3 + Ja/6 = 3 + 8 = 11 then 11+5 = ??? 48/3 16 = 16 sure enough
February 5, 2017

need info
Please type entire problem. Without knowing the density of the logs or the mass of you and your friend, no way. call log density rho call g = 9.81 m/s^2 water density = 1000 kg/m^2 mass of passengers = m n = number of logs n * .13^2 *2.2 = V, needed volume of logs 1000 g V = B...
February 5, 2017

mechanics
F1 = f in x direction F2 = f cos 60 in x and f sin 60 in y total x = f +f cos 60 = 1.5 f total y = f sin 60 = [sqrt3/2]f magnitude of resultant = sqrt [ 1.5^2 f^2 + 3/4 f^2 ] = f sqrt [2.25 +.75 ] = f sqrt 3
February 5, 2017

Phycis
(1/2 )m v^2 + m g h = 1470 so Ke = 1470 - m(9.81)25 to get a numerical answer you need to know m
February 5, 2017

Physics
with constant acceleration a: v = Vi + a t x = Xi + Vi t + (1/2) a t^2 here Vi = Xi = 0 so x = (1/2)at^2
February 4, 2017

math
Fid = Fif + 26 Fif = R-12 so R = Fif+12 Fid + Fif + R = 71 Fif+26 + Fif + Fif+12 = 71
February 4, 2017

physics
2.2*10^4 = mg + ma =2150(9.81+a)
February 4, 2017

Calculus
http://www.jiskha.com/display.cgi?id=1486194050
February 4, 2017

value
75/3 = 25
February 4, 2017

distance ?
You have to know some distance in the problem. Otherwise you just have similar triangles of arbitrary size.
February 4, 2017

maths
well, go ahead. 30, 60, 90 triangle side opposite 30 = 5.6 sin 30 side opposite 60 = 5.6 sin 60
February 4, 2017

Calculus
tangent of angle above x axis = 35/42 magnitude = sqrt (42^2+35^2)
February 4, 2017

Math
0 to 9
February 4, 2017

Physics
F = G Mm m /Rm^2 F/m = G Mm/Rm^2 = 6.67×10-11 m^3 kg-1 s-2 * 1.08*10^16kg/[1.35*10^4]^2m^2
February 4, 2017

history
No way !
February 4, 2017

Math
4/-2 = -2 -2/-2 = 1 1/-2 = -1/2 (-1/2)/-2 = 1/4
February 4, 2017

math
(35/64)a = 2450 a = 2450*64 /35
February 3, 2017

Math : ratio and proportion
(2 L/80km) 1 km = 1/40 liter
February 3, 2017

Geometry
north wind due to boat speed at 16 kn west wind at 10.4 kn magnitude = sqrt(16^2+10.4^2) tan angle west of north = 10.4/16 compass angle= 360 - that angle
February 3, 2017

Math
5 * .0625 * 7150 = interest due total = interest due + 7150
February 3, 2017

Mathmaybe something like:s
7 , 8, 9 , 11 , 11, 11
February 3, 2017

MS. SUE! World History (Absolutism and Revolution)
The second one, Peter the Great's accomplishments,is correct. Do not forget he established a Russian port, called St. Petersburg, on the Baltic. I do not know much about Maria T. However from what little I know I would vote for #3.
February 3, 2017

History
http://www.britannica.com/event/United-States-presidential-election-of-1860
February 3, 2017

History
10 a is correct 3 see http://www.carolana.com/SC/1800s/antebellum/educational_opportunities.html 7. D is correct 8. http://www.geni.com/projects/Southern-Fire-Eaters/4715 9. Good grief, no slavery did not become legal in Massachusetts. However in theory after that decision, a ...
February 3, 2017

Maths
two years at 3% = .03*2 = .06 so .06 times original deposit = 72 so 72/.06 which is 1200
February 2, 2017

Maths
.06 v = £72
February 2, 2017

C
Sometimes: "Code of Ethics"
February 2, 2017

dynamics
v = -k ln x + c 15 = -k ln .6 + c 9 = -k ln 1.2+ c -----------------subtract 6 = -k ln(.6/1.2) etc
February 2, 2017

Math m1
600 = 400 a so a = 600/400 total force = 400 a + 1000 a = 1400 a
February 2, 2017

physics
and add heat of vaporization to steam
February 2, 2017

Geologic Time and Earth's History Unit Te
I would be happy to do it but need WhiteRain's text book.
February 2, 2017

ah --
hey - only the component in the k direction passes through your loop :)
February 2, 2017

set maths
You have to do this with a Venn diagram, which I can not really draw here but using that you should be able to figure it out.
February 2, 2017

So where is your work?
So where is your attempt to do this? There are two common ways, I do not even know which you are using since I see no work.
February 2, 2017

History
1. agree 2. agree 3. agree 4. agree Hey, you know the answers perfectly well :)
February 2, 2017

Math--Matrix
http://matrixcalc.org/en/vectors.html
February 2, 2017

Math--Matrix
http://www.sosmath.com/matrix/eigen1/eigen1.html
February 2, 2017

physics
Newtonian Gravity, objects of mass M and n: F = force of attraction on each F = G m M/r^2 if M is earth mass, call it Me and r is earth radius, call it Re then G Me/Re^2 = 9.81 m/s^2 approximately so F = 9.81 m F/m we call acceleration of gravity on earth, g = about 9.81 If ...
February 2, 2017

physics
now F = m g work done against gravity = integral F*dr or m g dr or m * integral g dr m 9.8 Re^2 integral dr/r^2 from Re to 4 Re integral dx/x^2 = -1/x so here 1/6,400,000 - 1/25,600,000 = 1.17 * 10^-7 so work done in Joules - m 9.8 Re^2 * 1.17* 10^-7 = m (47,040,000) Joules ...
February 2, 2017

trick question
Although g may be about 9.8 m/s^2 at the surface of earth, it is not 9.8 at 4 Re and therefore you can not assume it is constant g = 9.8 (Re^2/r^2)
February 2, 2017

calculus
yes
February 1, 2017

backwards
sorry P(0 broke) = 1* 1 * .82^11 P(1 broke) = C(11,1).18^1 .82^10 P(2 broke) =C(11,2).18^2 .82^9
February 1, 2017

stats
p yes broke = .18 p not broke = .82 P(0 broke) = 1*.18^11 * 1 P(1 broke) = C(11,1).18^10 .82^1 P(2 broke) =C(11,2).18^9 .82^2 C(11,1) = 11 C(11,2) = 55
February 1, 2017

physics
Once again you have not given the moment arms Torque or moment is force * distance from axis
February 1, 2017

algebra
(6-4)/(2-3) = 2/-1 = -2
February 1, 2017

dumb error
4(-4)+7 = k(-4) + 10 -19 = -4k k = 19/4
February 1, 2017

Math Cal 1
4(-4) + 7 = k(-4) - 4 -4k = -5 k = +5/4
February 1, 2017

magic difficult
I have no idea about directions or moment arms. The force furthers from the axis exerts the greatest moment, if and only if they are normal to the door.
February 1, 2017

Physics
mass = 2166 * (4/3)pi r^3 weight = 9.81 (2166)(4/3)pi r^3 balance weight with Stokes force weight = 6 pi ? r v so 6pi? r v=9.81 (2166)(4/3)pi r^3 9 ? v=9.81 (2166)(2)(9*10^-6)^2 9 ? v=9.81 (2166)(2)(9*10^-6)^2 v = 382472 *10^-12/? have to know ? to estimate v, see part b v =...
February 1, 2017

physics
ah come on 2 pi rad/22.8 s so what is the circumference? C = 2 pi R = 22.8s * 37.3m/s = 850 meters around the track so R = 850/(2 pi)
February 1, 2017

MATH PLEASE CHECK AND HELPPP
Always draw a picture !
February 1, 2017

M1-math
Nope, say F = ma a = 400/t so t = 400/a d = Vi t -(1/2)a t^2 d = 400 t - (1/2)(400/t)t^2 d = 400 t - 200 t = 200 t t = d/200 = .01/200 = 5*10^-5 s again a = 400/t = 8*10^6 F = m a = .02*8*10^6 = 160,000 N again :)
February 1, 2017

M1-math
momentum = m v = .020*400 = 8 kg m/s stops in 1 cm = .01 meter average speed during stop = 200m/s so time to stop t = .01/200 = 5*10^-5 seconds Average force = change of momentum/time = (8/5)10^5 = 160,000 Newtons
February 1, 2017

physics
Well, if you get a few million miles above the north pole and look down, the earth spins counterclockwise about its axis and also orbits counterclockwise around the sun, so take that as positive,clockwise looking up :) (sun rises in the east :) so daily spin: 2 pi rad/24 h * 1...
February 1, 2017

Social studies
:)
February 1, 2017

Social studies
Bethlehem Steel gave me an engraved watch at the launching. It is here in my desk drawer.
February 1, 2017

Social studies
My mother and I flew to California on China Clipper seaplane after bombing. Father went to sea.
February 1, 2017

Social studies
Yes, on bridge of Cruiser San Francisco off Guadalcanal Nov 12-13 1942, Iron bottom Sound
February 1, 2017

Social studies
Google Destroyer Escort 643
February 1, 2017

Social studies
Yes, scary then. Long story.
February 1, 2017

Social studies
( I lived there until January 1942.)
February 1, 2017

Social studies
Hawaii annexation was before the Spanish American war, agree
February 1, 2017

math
120 sin 8 degrees
February 1, 2017

physics
(1/4) as far because 25 cm/100 cm = 1/4
February 1, 2017

physics, science!
Oh my, I just noticed the Bob Pursley answered an almost identical question for you. note w^2 r = v^2/r and READ THE CHAPTER in your text on centripetal acceleration !
February 1, 2017

physics, science!
circumference = 2 pi r = 2 pi(.2) speed = v = distance/time = 2 pi (.2)/36 Ac = v^2/r F = m Ac = 37 v^2/r
February 1, 2017

No idea
If it is in a triangle, 72+113+x=180 otherwise I have no idea what sort of drawing you are talking about.
February 1, 2017

PHYSICS
fall 45 m: (1/2) m v^2 = m g h so v = sqrt(2 g h) = sqrt(90*9.81) = 29.7 m/s Vi = 29.7 average speed during stop = 14.9 so stopping time = 4.10/14.9 = .279 seconds a = dv/dt = 29.7/.279 = 106 m/s^2 looks like E, what are you using for g I wonder
February 1, 2017

science
I would guess pretty much constant thrust. So pretty much constant acceleration. a = F/m v = a t x = (1/2) a t^2
February 1, 2017

science
2^n bacteria where n is the number of periods You did not say how long a period was or how many is half full or how many is full.
February 1, 2017

Maths: Surds
Oh, did no. notice the "in half"
February 1, 2017

Maths: Surds
a(a+b) = 100 but b = 2a/(1+sqrt5) a [ a + 2a/(1+sqrt5) ]=100 a^2 [ 1 +2/(1+sqrt5) ] = 100 etc
February 1, 2017

Maths: Surds
I do not see your picture but suspect you are talking about what is often called the "golden ratio". http://en.wikipedia.org/wiki/Golden_ratio
February 1, 2017

Chemistry
if you have 2 moles of B you need 6 moles of A In other words you do not have enough A I guess I just said 2) :)
February 1, 2017

algebra
conversion factor is (14 gal/340 mi) (14 gal/340 mi)(544 mi) = 22.4 needed for whole trip so 22.4-14 = 8.4 more needed ============================= with proportions (I do physics not math so not my thing) 14/340 = x/544 so x = (14/340)544 again
February 1, 2017

Physics
a = change in velocity/time = 105/1.2*10^-3 = (105/1.2)10^3 x = 40(1.2)10^-3 - (1/2)at^2 = 40*1.2*10^-3 -(105/2.4)10^3 (1.2)^2 10^-6
February 1, 2017

physics
u = 42 cos 36 horizontal speed so t = 27/(42 cos 36) Vi = 42 sin 36 initial speed up h = Vi t - 4.9 t^2
January 31, 2017

Physics
0.5 m^3 * 2.70 * 10^3 kg/m^3 = 1.35 *10^3 kg = 1350 kg
January 31, 2017

Calculus
I do not see how it could be otherwise. If there were a singularity at infinity resulting in an undefined limit, then how could the domain include plus and minus infinity?
January 31, 2017

math
2.2222 + 4.375 = 6.6 so p = 13.2
January 31, 2017

math
4 3/8 * w = 9 13/18 35/8 * w = 175/18 9/9 (35/8) * w = 4/4 (175/18) 315 w = 700 w = 140/63 = 2.222...
January 31, 2017

Technology HURRY
It is not B
January 31, 2017

stats
keep this link handy: http://davidmlane.com/hyperstat/z_table.html
January 31, 2017

Algebra 2 help its urgent please(:
tan 62 = h/112 so h = 112 tan 62
January 31, 2017

physics
u = 24 m/s forever x = u t where t is time to fall 124 m h = (1/2)g t^2 124 = 4.9 t^2 t = 5.03 seconds so x = 24 * 5.03 = 121 meters
January 31, 2017

Chemistry
22.4 liters /mol at STP so the real question is how many mols of H2 produced wise to balance equation: Mg + 2HCl ----> MgCl2 + H2 so One mol of H2 for every mol of Mg Mg = 24.3 g/mol 4.8 g/24.3g/mol = .198 mol of Mg so .198 mol H2 .198 mol (22.4 liters/mol ) =4.42 liters H2
January 31, 2017

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