Friday
April 29, 2016

# Posts by Damon

Total # Posts: 26,095

social studies hurry
What specific region?
January 18, 2016

social studies help
LOL - yes, Saddam Hussein of Iraq invaded Kuwait to get their oil. There was a war about it.
January 18, 2016

social studies help
Google Kuwait industry but really, watch the news
January 18, 2016

help on math
(3*12.5 + 17) * 1.06
January 18, 2016

physics
initial momentum = 7.05*8.24 + 0 final momentum = 7.05 * v + 1.53*13.2 final momentum = initial momentum
January 18, 2016

social studies hurry
Post them But you have not been watching the news much if you are having trouble with what Arabia and Iraq (Mesopotamia) look like.
January 18, 2016

.8*36.95 + .667*21.42
January 18, 2016

Physics
orbit circumference = 2 pi *1.9*10^7 miles time for orbit trip = 2.9*10^7 s speed = 2 pi *1.9 / 2.9 miles/second = 4.12 miles/second You did not say what units in miles per hour, multiply by 3600 and get 14,820 miles/hour
January 18, 2016

physics
Xray or Gamma ray
January 18, 2016

physics
E = h f = 6.626 *10^-34 f Joules 1 ev = 1.6 * 10^-19 J so E is 15*10^3 *1.6*10^-19 J = 24 * 10^-16 Joules so 24 * 10^-16 = 6.626*10^-34 f f = 3.62 * 10^18 Hz now go look at your spectrum if it is by wavelength lambda = 3*10^8/(3.62*10^18) = .828 * 10^-10 = 8.28 * 10^-11 meters
January 18, 2016

1.2 * 7.65 * 40
January 18, 2016

1 and itself
January 18, 2016

math
x and y in first quadrant if sin x = 1/4, we will need cos x sin^2 x + cos^2 x = 1 cos x = sqrt( 1-1/16) = sqrt (15/16) = (1/4) sqrt 15 similarly if cos y = 1/5 sin y = sqrt (1- 1/25) =sqrt (24/25) = (1/5)sqrt 24 now with sin x = .25, cos x = .25 sqrt 15 and sin y = .20 sqrt ...
January 18, 2016

Physics
The package has the same horizontal velocity component as the plane. (Note- if you drop a bomb at low altitude, turn your airplane immediately after release) Fall of 235 m 235 = (1/2)g t*2 = 4.9 t^2 t = 6.93 seconds to fall horizontal problem d = u t d = 69.4 * 6.93 = 481 ...
January 18, 2016

Physics
First vertical problem: Vi = 75.2 sin 34.5 = 42.6 m/s v = Vi - g t g = 9.81 m/s^2 so v = 42.6 - 9.81 t at the top, v = 0 t = 42.6/9.81 = 4.34 seconds to top 2 t = 8.68 seconds total in air range = 8.68 * 75.2 cos 34.5 at t = 1.5 v = Vi - g t = 42.6-9.81(1.50) = 27.9 m/s u = 75...
January 18, 2016

Math ASAP
-6w - 30 - 9 = -6 w - 39 ========================= 2 x + 3 x - 3 x = 2x -6 + 18 = +12 so 2 x + 12
January 18, 2016

Pre-Calc
1/sin^2x = 4 so sin^2 x = 1/4 so sin x = +1/2 or -1/2 four solutions, yes
January 18, 2016

Physics
It fall more than a meter? checking Yes, 1.129 m ========================== sorry, I am used to y up Vi = 250 sin T u = 250 cos T t = 120/u = 120/250 cos T h = Hi + Vi t - 4.9 t^2 here we on the same level so h = Hi 0 = Vi t -4.9 t^2 t (4.9 t - Vi) = 0 obviously it is at ...
January 18, 2016

Physics
momentum before = momentum after 50 * 10 + 100 * 0 = 150 * v
January 18, 2016

Chemistry
The pressure depends on the average (1/2)mv^2 of the gas molecules but it is (1/2) m v^2 that you get from kinetic theory and not (1/2) v^2 the gas has the same kinetic energy at temperature T no matter what its mass might be. see: http://hyperphysics.phy-astr.gsu.edu/hbase/...
January 18, 2016

Physics
in time t vehicle A travels distance d vehicle B travels distance (d-819.017) 93.602 t = d 44 t = d-819.017 so 44 t = 93.602 t -819.017
January 18, 2016

Chemistry 101
12.52 lbs = 5.68 kg = 5680 grams well first of all the volume of water does not change. The same water is still there unless it splashed out. However the final volume of stuff in the cylinder increases by the volume of lead which is 5680 grams (1 cm^3/11.3 grams) = 503 cm^3 = ...
January 18, 2016

ap physics
m2 g = m1 v^2/r
January 18, 2016

AP Physics
Vi = 4 sin 25 down so = -1.69 m/s u = 4 cos 25 forever = 3.63 m/s Hi = 1.2 h = Hi + Vi t -4.9 t^2 0 = 1.2 - 1.69 t - 4.9 t^2 4.9 t^2 + 1.69 t - 1.2 = 0 t = [ -1.69 +/- sqrt(2.86+23.5)]/9.81 t = .815 seconds d = u t = 3.63 * .815 = 2.96 meters
January 18, 2016

check earlier volume of pipe
Check earlier problem. diameter not radius was given
January 18, 2016

Chemistry 101
r = 6.5/2
January 18, 2016

Physics
same as any other distance = speed * time problem time = (.97/20) seconds of course we did not use the diameter bit but perhaps there is a part B ?
January 18, 2016

Math
You are welcome.
January 18, 2016

Math
ok BOTTOM/SIDE = bottom/side 9/x = 4/2 which happens to be what we did.
January 18, 2016

Math
well you do not show it but perhaps 4/2 = 9/x in which case x = 4.5 but I do not know what your triangles look like if the corresponding sides are not as I assumed then the right answer could be 18
January 18, 2016

typo
I mean -1/(-1/4) = +4
January 18, 2016

Algebra (Urgent)
the slope must be 1/(-1/4) which means m = +4 the first one is a yea y = +4 x - 2 the second one is a yes y = +4 x + 0 the third one is a no y = (1/4) x - 6 the fourth one is a yes y =+4 x + 3 Please check your reply Lady P
January 18, 2016

Math
3x+4 = 16 and 3x+4 = -16 x = 4 and x = -20/3
January 18, 2016

Physics
10.5 u = (10.5+104) v F = m a = -.658 m g so a = -.658(g) work done = F d = m (.658)(g) (6.66) work done = Ke after collision so (1/2) m v^2 = m(.658)(g)(6.66) v^2 = 2(.658)(g)(6.66) solve for v then u = (10.5+104) v/10.5
January 18, 2016

MATHS
a = X a r = X+1 so r = (X+1)/X a r^2 = X+4 so X [(X+1)/X ]^2 = X + 4 (1/X)(X^2 + 2 X + 1) = X + 4 X^2 + 2 X + 1 = X^2 + 4 X X = 1/2
January 18, 2016

Math
say base is a 6 by 6 square then 4 blocks will sit on it then another layer fits so 8
January 18, 2016

Physics
how long to fall from 50 m? h = (1/2) g t^2 t = sqrt (2 h/g) = srt (100/9.81) = 3.19 seconds d = u t = 40 * 3.19
January 18, 2016

math multiply binomials by trinomials ( really need help)
Now the only trinomial is at e) (x-2y)^2 = x^2 - 4 x y + 4 y^2 now we multiply that by (3x-6y) use distributive property (a+b)(c+d+e) = a(c+d+e) + b(c+d+e) so we have +(3x)(x^2 - 4 x y + 4 y^2) -(6y)(x^2 - 4 x y + 4 y^2) = +3 x^3 - 12 x^2y + 12 xy^2 -0 x^3 - 6 x^2 y + 24 xy^2...
January 17, 2016

math multiply binomials by trinomials ( really need help)
well, we do not need the distributive property if you know FOIL I do not dare to do a) because I do not know if you mean (1/5)x or 1/(5x) when you write 1/5x b) (2a-3)(2a-3) = 4 a^2 - 12 a + 9 -(3a+4)(3a-4)= -9 a^2 + 0 a +16 2(3a+1)(3a+1)= 18a^2 + 12 a + 2 add 13 a^2 + 27 etc
January 17, 2016

Physics pleasse use ^
Ms = 2.13 * 10^5 Me Me = Me Ms x = Me (d-x) x/(d-x) = Me/Ms = 1/ (2.13*10^5) x<<<< d so assume x/d = 1/(2.13*10^5) x = 7.87 *10^8/(2.13*10^5) x = 3.69 * 10^3 = 3690 km check 3690 is indeed <<<< 7870*10^5 :)
January 17, 2016

Science Help
The number of molecules and their mass does not change however the volume increases if the balloon expands so mass/ volume decreases
January 17, 2016

algebra
F = k * w * v^2 /R 182 = k (1800) (900)/600 k = .0674 F = .0674 (1800) (2025)/650 = 378 pounds
January 17, 2016

math
3/8 + 1/3 = 9/24 + 8/24 = 17/24 24/24 - 17/24 = 7/24 but are you sure you did not spend 1/3 OF THE REMAINDER on snacks?
January 17, 2016

Calculus/ Application Of Derivative
I get A = pi r^2 = 75 pi r = 5 sqrt 3 so dV = pi (75) dh dV/dt = 75 pi dh/dt so dh/dt = .5 m^3/min / (75 pi m^2) .5/(75 pi) = .00212 m/min
January 17, 2016

Calculus/ Application Of Derivative
http://www.jiskha.com/display.cgi?id=1453063814#1453063814.1453064668
January 17, 2016

scroll down
I JUST DID THIS !!!
January 17, 2016

algebra
d = k t^2 64 = k (2)^2 so k = 64/4 = 16 then d = 16 (15)^2 d = 16 * 225 d = 3600 feet ============ check g = 32 ft/s^2 h = (1/2) g t^2 = 16 t^2 yes
January 17, 2016

History
We seem to be talking about the era of Cyrus etc well, back then most religions had gods for just about everything.
January 17, 2016

algebra 2
we want 10 y in both so mutiply the whole first equation by 2 -12 x + 10 y = +8 +7 x - 10 y = -8 -----------------------add - 5 x = 0 well, x = 0 then 5 y = 4 so y = 4/5 or -10 y = -8 so again y = 4/5 (that was a check) the lines intersect at (0 , 4/5 )
January 17, 2016

Maths
Trick: at depth h the volume increase with delta h = the surface area * delta h draw that and remember it. surface area = pi r^2 what is r of surface at h = 5 ? that takes some geometry triangle from center 5^2 + r^2 = 10^2 r^2 = 75 r = 5 sqrt 3 so dV = pi (75) dh dV/dt = 75 ...
January 17, 2016

I do not know
rounding to what? nearest whole number (4,3) to one decimal place? ( 4.3 , 3.3 ) to two places (4.35 , 3.33) etc etc etc
January 17, 2016

Math
(0,0) is the origin. I do not know where you drew it on your piece of paper :) (it might be way over on the lower left :)
January 17, 2016

math
b/g = 8/7 so b = (8/7) g b + g = 195 (8/7) g + (7/7) g = 195 15 g = 7 * 195 g = 7 * 195 / 15 etc
January 17, 2016

what?
I can not figure out what you mean. y = 6 * 4^2x + 2 or y = 6 * 4^(2x + 2) or y = 6 * 4^2 * x + 2 or y = 6 * 4^2 * (x + 2) and none of the above ca be expressed as y = A b x as far as I know
January 17, 2016

Physics
The horizontal speed of the supplies during the fall is the airplane speed (if you drop a bomb, then turn, because if you go straight it hits under you :) so how long to fall 160 meters? (1/2) g t^2 = 60 t^2 = 120/g = 120/9.81 t = 3.5 seconds
January 17, 2016

heat depends how far vertically down the ramp d sin theta
January 17, 2016

total cost ? = 1200 = 2 * 600 so q = 600 ? Total revenue? = 3 q = 1800 ?? Makes no sense Perhaps cost = 1,200 PLUS 2 Q ???
January 17, 2016

for what
6 a + 3 c = what is the question
January 17, 2016

physics
According to the de Broglie hypothesis, every object in the universe is a wave, a situation which gives rise to this phenomenon. The position of the particle is described by a wave function \Psi(x,t). The time-independent wave function of a single-moded plane wave of ...
January 17, 2016

physics
Look here maybe: http://en.wikipedia.org/wiki/Uncertainty_principle particularly the wave probability stuff.
January 17, 2016

physics
If you are into modern physics, there is a low but finite possibility of anything. In fact you might not be there where you think you are at all. Luckily you usually are on the same side of the wall you were before you did not move.
January 17, 2016

Math
Yes 80 gal * (8 pints/gal ) = 640 pints
January 17, 2016

Math
80 gallons is indeed more than 350 pints
January 17, 2016

Math
2/9 boys b 7/9 girls g b = (2/7) g or g = (7/2) b g - 250 = b (7/2) b - b = 250 (5/2) b = 250 5 b = 500 b = 100
January 17, 2016

Math link to sinking fund formula
for example http://www.math.utep.edu/Faculty/cmmundy/Math%201320/Worksheets/Sinking%20Funds%20&%20Annuities.pdf
January 17, 2016

Math
.052/4 = .013 = r so multiply by 1.013 every quarter year n = number of quarter years Google amount of a sinking fund S = 250 [(1+r)^n - 1 ] /r 6500 /250 = 26 = [(1+r)^n - 1 ] /r 26 = [ 1.013^n - 1 ]/.013 .338 = 1.013^n - 1 1.338 = 1.013^n so n log 1.013 = log 1.338 n (....
January 17, 2016

Math
Yes :)
January 17, 2016

Math
NO!!!! the whole point of my reply was .625 < .626
January 17, 2016

Math
but 5/8 = .625
January 17, 2016

Maths lit, geography ,agricultural science. Life science
How is a retired physicist in the United States supposed to be able to help with this? You must talk to the guidance person in your own school in your own country and follow your own wishes, not mine. If you have a math or physics problem, that is another matter :)
January 17, 2016

math,eng,phy,chem,bio,geography,economics
You used 8.99 - 3.65 = 5.34 g O2 for 8.99 g of Sc 5.34 + 8.99 = 14.33 g total Sc2O3 5.34 / 14.33 = .373 or 37.3 % ============================ check O3 = 3 * 16 = 48 Sc2 = 2 * 45 = 90 total molecular mass = 138 48/138 = .347 or 34.7 % looks like the experiment was a little off :)
January 17, 2016

sorry, do not understand experiment
What is the reaction you mean?
January 17, 2016

Physics
together we make 7+5 = 12 opposite we make 5-7 = -2
January 17, 2016

Calculus
eeewww http://www.wolframalpha.com/input/?i=plot+%282+%E2%88%92+x%29^%28e^%E2%88%92x%29+
January 17, 2016

World history/ Latin America
5. Phillipines ????? where are they?
January 17, 2016

World history/ Latin America
2. NO !!!!!
January 17, 2016

physics
F = k Q1 Q2/d^2 for each we want x so F = 0 distances are x and from 2.4 and 1-x from -5.6 for F = 0 2.4/x^2 - 5.6/(1-x)^2 = 0 (NOTE - by inspection you can see that to get zero you must be left of the origin, negative x) if you locate so F = 0, then the electric field from ...
January 17, 2016

Physics
hen eggs have reasonable sigma. classroom chalk (I assume we are talking used chalk) has wild variation so would require far more observations and might eventually converge to a mean weight somewhat over half the weight new in the box.
January 17, 2016

Physics
vertical problem: s = muzzle velocity Vi = s sin 30 = s/2 u = s cos 30 = .866 s 7.8 = .866 s t where t is time in the air so s t = 9 t = 9/s h = Hi + Vi t -4.9 t^2 at ground h = Hi = 0 0 = 0 + (9)/2) - 4.9 (81/s^2) 4.5 = 396.9/s^2 s = 9.39 m/s Now you do all that for new s = 1...
January 17, 2016

Math Teacher Certification Exam
B = .02 + 2 (6.24) = .02 + 12.48 = 12.50 12.50 + 6.24 = \$ 18.74 But beware. I am not certified to teach anything bur sailing!
January 17, 2016

Math/ algebra
area = A A/2 = pink Tulips (3/8) A = purple iris A/2 -(3/8) A = (1/8) A left (1/2)(1/8) A = 1/16 A = left so we want 1/16 You did fine (1/16)* 100 = 6.25 %
January 17, 2016

Physics
1.9 * 10^6 = 19 * 10^5 divide that by 1.7 * 10^5 the 10^5 cancels and the ratio of distance between to diameter is 19/1.7
January 17, 2016

Physics
19/1.7 = 11.2 11.2 * 26 = 290 cm = 2.9 meters
January 17, 2016

world history
agree, agree although oversimplified
January 17, 2016

world history
8. Is Taft 7. is income tax enough already, read this: http://quizlet.com/59801627/chapter-8-history-test-flash-cards/
January 17, 2016

Physics
.020 Cc (200 - T) = (.060 Cc + .050*4200) (T-30) where Cc is specific heat of copper in J/kg deg C
January 17, 2016

trigo
antenna height = h from roof up building height = b tan 42 10 = b/36 solve for b then tan 51 23 = (b+h) / 36
January 17, 2016

math
(.0025 /12)210,000 = \$43.75
January 17, 2016

math
Hey, if you have a calculator, divide. If you do not, google calculator. Oh well 2/9 is much less than 4.4/9 which is 1/2 4/7 is bigger than 3.5/7 which is 1/2
January 17, 2016

math
0.85 * x = 45 so x = 45 / 0.85
January 17, 2016

Calculus,Stationary Points,First derivative test
You say dy/dx = 6(x^2 - x - 2) so the function is horizontal when (x-2)(x+1) = 0 or x = 2 and x = -1 Agreed NOW you can test it like you did, but usually what you do is take the second derivative. If it is +, the function is at the bottom and about to start up. If it is ...
January 17, 2016

Maths
Hey, try I will do D 3 sqrt 18 = 3 sqrt (9*2) = 3 sqrt (3*3*2) = 3*3 sqrt 2 = 9 sqrt 2 = 9 (1.414) around 12.5 or so which is between 12 and 13 NOW check that with your calculator (Google calculator if you do not have one on your desk) 3 sqrt(18) = 12.728
January 17, 2016

ah I do not think so !
8+3+5 = 16 not 11 so 3/16
January 17, 2016

chemistry
25 + 273 = 298 degrees Kelvin P V = n R T n and R are constant You do not mention P, so I guess maybe the pressure is constant? V/T = n R/P = constant so V1/T1 = V2/T2 T2 = (V2/V1) T1 T2 = .5 T1 = 298/2 = 149 K -273 + 149 = - 124 C That is wicked chilly.
January 17, 2016

physics
DRAW A PICTURE The way I am looking at it: speaker at x = -6 speaker at x = +6 wave from left at x = -6 moves right y = sin (w t - 2 pi x/L) wave from right at x = + 6 moves left y = sin (w t + 2 pi x/L) at x y=sin(wt-2pi x/L)+sin(wt+2pi x/L) = 2sin(wt)*cos(2 pi x/L) This is ...
January 17, 2016

algebra ,
ends in 5 or 0 odd, so ends in 5 100 a + 10 b + c We know c = 5 100 a + 10 b + 5 a b 5 = 15 or a b = 3 a + b <5 100a + 10 b < 144 so a = 1 since a b = 3, b = 3 so 135
January 17, 2016

GCU
Well, it does not, but anyway W = k * L 162 = k * 9 k = 162/9 then W = k * 8 W = (162/9) 8 W = 144 Problem is, unlike in math class, when you make a boat longer you have to make it stronger and wider and deeper so in real life it is closer to W = k * L^3
January 17, 2016

Physics
heat the ball warms up and the ground warms up, but not much :)
January 17, 2016

geometry
You are welcome.
January 16, 2016