Saturday
April 19, 2014

Posts by Damon


Total # Posts: 16,166

math
.38*560 paste that into a Google search boxsw

physics
177 (12+32)/32 = 243 I get but anyway 177 (32 -32) = 0

Physics
60 *1000/3600 =16.7 m/s average speed during stop = 8.33 m/s time to stop t = 35/8.33 = 4.2 s acceleration = - 16.7/ 4.2 = 3.98 m/s^2 m a = mu m g mu = a/g 3.98 / g = .405

physics
r^2/rearth^2 = 4/3 r = rearth *sqrt (1.33) = 1.15 rearth height = r - rearth = .15 rearth

algebra
T e = 3 u T e/3 = u

physics
12 + 32 = 43 ft/s^2 177 * (43/32) = 238 pounds

circuit
is unfortunately "as shown in figure" somewhere

Math-Algebra 1
(1/2)(x+3)(x+6) = 119 x^2 + 9 x + 18 = 238 x^2 + 9 x - 220 = 0 (x+20)(x-11) = 0 x = 11

Math-Algebra 1
(x+4)(x+11) = 34 x^2 + 15 x + 44 = 34 x^2 + 15 x + 10 = 0 x = [ -15 + /- sqrt (225 -40)/2 x = [ -15 +/- 13.6 ] / 2 x = -14.3 or - .7 discard -14.3 because negative length and with would result so use x = -.7

chem please..
sometimes, if you are a different potentials so current flows. (Like if you rub something furry on a dry day, then repair your computer and a spark flies across and the mother board is fried.)

Math
L * L/4 = 144 ??? L^2 = 4*144 then L = 2 * 12 L = 24 (1/4) L = 6

please ..chem
photons? light? no way

math
remember that (n-1) stuff

Math help please
(2x +3)(x-1) = 2 x^2 + 1 x - 3 -7 ( 2 x^2 + 1 x - 3) = -14 x^2 - 7 x + 21

Math help please
It is

Math help please
I did this a few minutes ago here again -7 ( 2x + 1 - 3) -7 (2x+3)(x-1)

math
y = 25 - 3 x

Math
.85 * 45

Math
x^2 - 232 x = -p - 5000 x^2 - 232 x + 13456 = -p - 5000 + 13456 (x - 116)^2 = -(p - 8456) vertex at profit = 8456 and x = 116

Math
p = r - c = 240 x - x^2 - 5000 - 8 x = - x^2 + 232 x - 5000

Math
undefined because 0^-1 = 1/0

physics
U = potential energy of spring = (1/2) k x^2 calculate U for x = .244 meter calculate U for x = .122 meter decrease in U = (1/2) m v^2

distributive property
32 x + 4 x m

math
Assuming none were tied then lost = 100% - 60 % = 40 % .4 x = 42 x = 42/.4 = 420/4 = 105

physics
initial momentum = .00805 * 346 final momentum just after collision = M V + m v so .00805 = MV + m v we can do MV from how far up it goes (1/2) M V^2 = M g h =M (9.81)(.1504) cancel M and find V now we have it initial momentum = final momentum .00805 * 346 = .785 V + .00805 v ...

math
8 + 3*2 - 1 8 + 6 - 1 8 + 5 13

math
8+3*(6-4)-1=13 8 + 6 - 1 done

math
(11/10)14

Math help
no, the last term is 21, not 21 x -7 (2 x^2 + x - 3) = -7 ( 2 x + 3 )( x - 1 )

Physics
Vi = 80 km/ h * 1000/3600 = speed in m/s find that average speed during stop if deacceleration is constant = Vi/2 find that time to stop = 61/(Vi/2) find that - call it t acceleration a = = - Vi/t so Force = m a = - m Vi/t ----------------------------------- for Vi = (1/2) ori...

Physics-check answer please (multiple choice)
1. A 2.5 kg mass at rest on a horizontal surface is acted upon by an applied horizontal force of 150 N. A frictional force of 100 N acts on the mass. How much work is done on the mass? my answer: would the work be 0? ------------------- Yes, no motion, no work ----------------...

calculus
5 pi/3 = 300 degrees 3 pi = 540 degrees so from -60 degrees around circle then to +180 degrees pick some points and do it be careful around 90 and 270 because tan is undefined along y axis

Math ~ Need Help! ~
You are welcome :)

Math ~ Need Help! ~
bisect angle with compass and straightedge: http://www.youtube.com/watch?v=tDXrY8E3bFs

Math ~ Need Help! ~
Use that compass again. It is so close to what we just did that I am going to let you figure it out now.

Math ~ Need Help! ~
You have a compass? Set its width at about 3/4 the length of the line segment. put the point of the compass at one end of the segment and draw a circle put the point of the compass at the other end and draw a circle. those circles intersect on each side of the segment. draw a ...

Ms.Sue: German- will you pass this onto the German
Cassie, I speak Dutch (Nederlands) but not German. I can see that is incorrect and have my doubts about others but you need a German teacher.

This student needs German help
2.) They prefer the movie. A.) Sie haben den Film lieber. B.) Sie hat den Film lieber.********* I know just enough German to know that plurals and singulars and genders are not entirely correct in the chosen replies.

science --- grams???
It will be very hard to find out here or on Google because there is no unique answer. It depends on: The heat conduction characteristics of the container and how cold it is in the water and in the surroundings and how it is spread out on the cold container or surface. If it is...

physics
momentum before = 0 momentum after = 0 0 = 72 v + 5.6 * 3.9 v = -.303 recoils at .303 m/s

Chemistry
delta (mv) delta (position) = hbar/2pi = h/4pi delta (mv) = m electron (1.07*10^5)

Math
You went over from the top of the twenty foot pole to top of the thirty foot pole horizontally. That was thirty feet horizontal. Then you go up ten to go up from 20 to 30

Math
up ten and over thirty sqrt (100+900) 10 sqrt 10 31.6

Chemistry
Well, whatever he is after, I can not guess.

Chemistry
sorry, Ag+ certainly is silver ion and P-3 is phosphorus anion (or a Naval aircraft used for anti submarine warfare)

Math
15 cm = .15 m 4.0 m / .15 m = 26 2/3 to 1 similarly 3.2 m / .12 m = 26 2/3 to 1 26 2/3 / 1 = 26.7/1

world geography
well, not steppe. That is more central asia. not C., Southeast Asia has jungles but not South West It is not all desert. Mesopotamia and the Levant have reasonable climates and the Niles valley is not desert. That leaves me pretty much with A. The Nile water flows in from cent...

world geography
Results of a ten second search yielded the following wiki quote: " ..... Having established a provisional government in Ankara, he defeated the forces sent by the Allies. His military campaigns led to victory in the Turkish War of Independence. Atatürk then embarked ...

world geography
I am tempted go say for heavens sake Google him but try A.

calculus
find dy/dx, the slope call it m at the given point use the point in the equation to find b in y = m x + b

calculus
Exactly the same way I did the ellipse.

calculus
Now wait a minute. Try this one yourself first.

Physics
Ac = omega^2 R F = m Ac 26.4*9.81 = 3.19 (omega^2)(.795) omega^2 = 102 omega = 10.1 radians/s maximum v = omega R so v </= 8.03 meters/ second

calculus
2 x dx + x dy + y dx - 2 y dy = 0 dy ( x-2y) = - dx ( 2x + y) dy/dx = (2 x + y)/(2y-x) = slope at x = 2 4 + 2 y - y^2 = 5 y^2 - 2 y + 1 = 0 (y -1)^2 = 0 y = 1 so dy/dx = (5)/0 undefined

calculus
8 y dy + 2 x dx = 0 so dy/dx = m = -x/4y at x = 3, y = -2 dy/dx = -3/(4y) = 3/8 = m so y = (3/8) x + b -2 = (3/8)3 + b b = -25/8 so y = (3/8) x -25/8 8 y - 3 x = -25 3 x - 8 y = 25 (b)

Mat/116
went down 30 degrees in six hours T = - (30/6) t + b = -5 t + b -17 = -5 (2) + b b = -7 so T = -5 t - 7 check at 8 hours T = -5(8) -7 T = -40 - 7 T = -47, yes, good

math
5 = 1.25 x x = 4

sphy011
well, let's do the first half of the problem, upward, symmetrical velocity profile during fall g = -9.81 m/s^2 v = Vi - g t v = Vi - 9.81 t v = 0 at top in 5 seconds 0 = Vi - 9.81(5) Vi = 49 m/s

Physics
v = Vi + a t v = 0 after 20 ft we hope Vi = 20 * 5280ft/mi /3600s/h = 29.33 ft/s so a t = -29.33 a = -29.33/t d = Vi t + (1/2) a t^2 20 = 29.33 t + .5 (-29.33/t)(t^2) 20 = .5 * 29.33 t t = 1.36 seconds a = - 21.6 ft/s^2

algebra
12 y - 9 + 7 y = 19 y - 9

physics
T = tension in rope rope horizontal force = T cos 55 = .574 T rope force up = T sin 55 = .819 T weight = m g = 310(9.81) = 3041 N normal force on ground = weight - rope force up = 3041 - .819 T friction force max = .9(3041-.819 T) F = m a .574 T - .9(3041-.819 T) = 310(6.33) s...

physics
.7 = a/g = a/9.81 a = 6.87 m/s^2

?????
What net force is acting on this system if both blocks are on the table?

Physics
F = m g F = 2.25 * 9.8 = 22.05 N accelerated mass = m = 5.53 + 2.25 = 7.78kg a = F/m = 22.05/7.78 = 2.83 m/s^2 F on top block is force in cord F = m a = 5.53 * 2.83 = 15.7 N

Physics
m g = 33 * 9.8 Newtons 2. MASS DOES NOT CHANGE !!!!!!! 3. 33 * 9.8 / 6

Physics
u = horizontal velocity = 5.7 cos 58 = 3.02 m/s forever Vi = initial speed up = 5.7 sin 58 = 4.83 m/s v = Vi - 9.8 t at top, v = o 0 = 4.83 - 9.8 t t = .493 s at top h = 1.3 + Vi t - 4.9 t^2 t at top is .493 so h at top = 1.3 + 4.83(.493)-4.9(.493)^2 = 2.49 meters above ground...

Physics
The horizontal component of velocity does not change. Ignoring friction, there is no horizontal force, therefore no acceleration, therefore constant velocity in direction with no force. THIS IS IMPORTANT ! u = 15.6 cos 56.9

Physics
a = F/m F pilot = m pilot * same a

do not understand question
Is this the way the question is phrased in your book ?

Chemistry
first multiply by 10^-2 to get meters instead of centimeters so 3 * 10^8 m/s * 1 km/10^3m * 3600 s/hr = 10800 * 10^5 = 1.08 * 10^9 km/hr or type 3*10^8 m/s = km/hr Into a Google search box

Math repost
2 c + 3 L = 14.55 1 c + 2 L = 8.77 multiply second one by 2 2 c + 3 L = 14.55 2 c + 4 L = 17.54 -------------------- subtract -1 L = - 2.99 L = 2.99 then c = 8.77-2L = 2.79

physics
weight = 1.6 * 9.8 = 15.68 N T in each side of wire do right half, left the same 1/2 weight = 7.84 N half distance = 24.5 theta angle between vertical and wire Tan theta = 24.5/.149 theta = 89.65155 so cos theta = .00608152 T cos Theta = half the weight T = 7.84 N/.00608152 = ...

Intermediate Algebra
7 a + 2 f = 86 3 a + 4 f = 84 14 a + 4 f = 172 3 a + 4 f = 84 ------------------subtract 11 a = 88 a = 8 then 7(8) + 2 f = 86 so f = 15

Physics.
c 11/3 b 8/4 a 4/5 = 8/10 reverse the last two ? d 18/20 = 9/10

Physics
initial momentum North 800 * 18 East 800 * 18 final momentum North 1600 v sin T East 1600 v cos T (I am pretending I do not see that V = 18 sqrt 2 and T = 45 degrees) 800 * 18 = 1600 v sin T 800 * 18 = 1600 v cos T so sin T = cos T = 1/sqrt 2 That is T = 45 degrees so 800 * 18...

physics
weight - 126 g friction force = 126 * 9.81 * .7 = F if no acceleration

physics
loss of potential energy = m g h gain of kinetic energy = (1/2)m v^2 difference = work against friction which = F * 53 neters

physics
d = (1/2) a t^2 solve for a F = m a = mu m g so mu = a/g

physics
.24 g answered in another of your questions

physics
Hey, all of these are basically the same question. If you want to pass the course you better learn how to do one of them.

phisecs
bigger than, bigger than for example

phisecs
I answered this last night. Check at the bottom of this page.

physics
zero because F = m a = m*0.00

Math
copy and paste: this: (x^2+x-2) / (x^2-3x-4) here: http://www.mathsisfun.com/data/function-grapher.php

Math
y = (x-1)(x+2) / [ (x-4)(x+1)] when x = +1 , y = 0 when x = -2 , y = 0 when x = 0 , y = -2/-4 = 1/2 vertical when x = 4 or x = -1 = x^2/x^2 --> 1 when x is big positive or big negative

Calculus
(1/4)[-2x/(x^2-1) - ln(1-x)+ln(1+x) ] + c used Wolfram alpha

Calculus
at least it looks like the last one :)

Calculus
Whoops, yes, use Steve's

Calculus
probably sinusoidal y = a sin x + b cos x y' = a cos x - b sin x y" = -a sin x - b cos x = -y -a sx -b cx -a cx + b sx = 1 sx b = -a -a + b = 1 -2a = 1 a = -1/2 b = +1/2 so I get y = -(1/2) (sin x - cos x)

Science
600 V/0.1 m = 6000

phisecs
+8/3

Algebra 1 (Reiny)
3*10^2 * 1.5 * 10^6 = 4.5 * 10^8

science
The moon revolves around the earth. When it is between the earth and the sun, all we see is the side that is in shadow. That is "new moon" As it moves around so it is perpendicular to a line between earth and sun, we see the half that is lit. When it is behind the ea...

Math
(1/2) b h = 144 b = h/2 (1/2) h^2/2 = 144 h^2 = 144 * 4 so h = 12 * 2 = 24

Algebra
Good.

Algebra
as + af + ca = 778 af = as -195 ca = as -242 so as + as-195 + as-242 = 778 3 as = 1215 as = 405 you can take it from there I think.

Math
2^2 + h^2 = 16^2 4 + h^2 = 256 h^2 = 252 h = 15.87 ft By the way that ladder is dangerously steep.

Calculus
top and bottom both go to 0 try l'hopital derivative of top = 1(1)/(x+2)^2 --->1/4 derivative of bottom = 1 1/4 / 1 = 1/4

chemistry
1/3 of the original concentration

math
-8 + 3 - 8 + 1 - 8 + 3 - 8 + 1 - 8 52 44 47 39 40 32 36 28 29 21 maybe ?

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