Wednesday
July 27, 2016

Posts by Damon

Total # Posts: 26,563

physics dimention
y has no units r is length h is length g is length/time^2 so we have length^3/time^2 but for force we need m a or mass *length/time^2 we have g in there. I suspect we need mass :)
January 8, 2016

physics dimensions
A length B length/time or velocity C length/time^2 or acceleration
January 8, 2016

Math
Whew, we agree :)
January 8, 2016

Math
slope = (4-3)/(8-6) = 1/2 1/2 = (-2-4)/(n-8) n-8 = -12 n = - 4
January 8, 2016

Math
8 am at 0 8:18 at 4.5 8:48 at 7.5 miles ??? 18 min = .3 hour 48 min = .8 hour in first .3 hours speed = 4.5/.3 = 15 mph in next .5 hours = speed = 3/.5 = 6 mph average speed for the whole trip = 7.5 miles/.8 hours = 9.375 mph
January 8, 2016

Math
initial value = Vi after one year v = .8 Vi after two years v = .8 Vi *.88 after three years v = .8 Vi *.88 * .88 = .61952 Vi 1 -.61952 = .38048 so 38.048 percent
January 8, 2016

Math
2.04 * 10^7 = x * 1.025 x = 1.990243902*10^7 = 19,902,439
January 8, 2016

Math
3 1/5 / x = 4 1/2 ???? 16/5 / x = 9 / 2 or 9 x / 2 = 16/5 9 x = 32 / 5 x = 32 /45 --------------------- check 3.2/(32/45) = 4.5 ???? 32/45 = 3.2/4.5 heavens to Betsy, it is true :)
January 8, 2016

mechanics
You can get all of this from the first problem I did for you. I am beginning to get irritated.
January 8, 2016

Math
You are welcome :) That was fun !
January 8, 2016

Math
NOW if m = -1/m' Then it the lines are PERPENDICULR and they ARE -1/3 and 3 so it is not only a parallelogram but a RECTANGLE
January 8, 2016

Math
Get it now? Opposite sides have the same slope. GRAPH it carefully. I saw it on my quick sketch before I calculated slopes
January 8, 2016

Math
HE = (5+1)/(-3+5) = 3 GF = ((2+4)/(6-4) = 3 LOL, sketch wins, they are parallel NOW top and bottom FE = (5-2)/(-3-6) = 3/-9 = -1/3 GH = (-1+4)/(-5 -4) =3/-9 =-1/3 caramba! paralleogram
January 8, 2016

Math
sketch graph. Looks like a parallelogram but hang on. Might even be a rectangle:)
January 8, 2016

now now, I already did it
Hey, hang on and scroll down
January 8, 2016

physics
LOL, I just did most of this in your problem below.
January 8, 2016

physics
I assume that you are doing this a significant r>>Re so that you can not assume a constant g. It is easiest to do this with potential energy ---> kinetic energy define potential energy zero at infinity that way it is always negative, the more negative the faster. That...
January 8, 2016

Calculus @ Henry
dV = surface area * dh so dh/dt = dV/dt/surface area = Q/area
January 8, 2016

Algebra
http://www.jiskha.com/display.cgi?id=1452283876#1452283876.1452284419
January 8, 2016

Algebra
did I not do this right below here?
January 8, 2016

Algebra help pls fast
I assume you mean 8 by 8 on the bottom and 22 high. slant height from the center of a side of the base to top sqrt (4^2 + 22^2) = sqrt(500) = 10 sqrt 5 for altitude of one triangular side then A = 4 [(1/2) b h] = 2 (8)(10sqrt5) = 160 sqrt 5
January 8, 2016

Math
Well done John.
January 8, 2016

I disagree with you.
.7 * 500 = 350 2400/64 = 37.5 % 260/6.5 = 40% .2*140 = 28
January 8, 2016

Pre-Algebra Help pls fast
http://www.jiskha.com/display.cgi?id=1452283876#1452283876.1452284419
January 8, 2016

health and pe
yes detox
January 8, 2016

Physics typo
typo 147.05 J for #4
January 8, 2016

Physics
Take potential = 0 at ground level as instructed. 1. m g h = 4 * 9.81 * 1.25 =49.05 J 2. (1/2) m v^2 = .5*4*49 = 98 J 3. No friction so PE + Ke = constant = 49.05 + 98 = 147.05 J by the way that means when it stops at the top it should have potential energy of 147 J 147 = m g ...
January 8, 2016

Algebra
10- 3 = 7 8 - 3 = 5 6 - 3 = 3
January 8, 2016

physics
centripetal acceleration = v^2/r = 9/7.5 = 1.2 m/s^2 weight down = 9.81 m tension up = 495 so 495 - 9.81 m = m (1.2) 495 = m (11.01) m = 45 kg
January 8, 2016

Not finished yet Mel?
Hey, where are you ?
January 8, 2016

What do you plan to do while I do your calculus?
At least show some effort before asking some poor old retired guy to do it all.
January 8, 2016

Calculus
hint dh/dt * surface area = 4 cm^3/min
January 8, 2016

Calculus
find ds/dt when it reverses ds/st = 0 find the acceleration d^2s/dt^2 then
January 8, 2016

Calculus
L = 30 - 2 h w = 16 - 2 h V = L * w * h V = (30-2h)(16-2h)h take dv / dh and set it to zero use only resulting h values that do not give you negative w when you subtract 2 h from 16
January 8, 2016

Calculus
if y = 3x^(1/3) + 6x^(4/3) then dy/dx = x^-(2/3)+ 8 x^(1/3) and d^2y/dx^2 =-(2/3)x^-(5/3)+(8/3)x^-(2/3) extrema or inflection where dy/dx = 0 note slope undefined when x = 0 dy/dx = x^-(2/3)+ 8 x^(1/3) = 0 or 1/x^(2/3) = - 8 x^(1/3) 1 = -8 x x = -1/8 so what is d^2/dy^2 when x...
January 8, 2016

History
Well, best read up on it but I might be inclined to pick the first.
January 8, 2016

History
I am sure it is not C. Although John Smith did sail around here and actually named parts of Cape Ann in Massachusetts, he is known mainly for hanging out down around Virginia. Neither of those people was particularly easy to get along with.
January 8, 2016

p.e
I am going to contest my heredity and see if it helps.
January 8, 2016

Aluminum powder Separation
Is any of that stuff magnetic? Does any of it dissolve in anything handy?
January 8, 2016

science
Well, yes, but I would be more like does not absorb as much as dark colors do.
January 8, 2016

History
D is correct.
January 8, 2016

maths
volume of anything pointy with straight sides = (1/3) height * area of base so V = (1/3)(8)(4) pi for sphere V = (4/3) pi r^3 so (4/3) pi r^3 = (1/3)(32 pi) r^3 = 8 r = 2 diameter = 2 r = 4 cm
January 8, 2016

Math
http://www.mortgagecalculator.org/
January 8, 2016

History Help pls
I would be inclined to go with A
January 8, 2016

History Help pls
check out http://www.sciway.net/afam/slavery/houses.html
January 8, 2016

History Help pls
well, google slave plantations maybe
January 8, 2016

History Help pls
The pictures I have seen of plantation life show rows of small slave cabins. I have a sneaking suspicion that (A.) s correct but your text book must tell you.
January 8, 2016

History
Remember all that about 4/5 of a person for each slave?
January 8, 2016

Checked it - ok
-5 x^2 - 10 x - 5 = y x^2 + 2 x + 1 = -y/5 (x+1)^2 = -(1/5)(y-0) sure enough it works :)
January 8, 2016

math
k x^2 - 10 x - 5 = y k x^2 - 10 x = y + 5 x^2 -(10/k)x = (1/k)(y+5) x^2 -(10/k) x + 25/k^2 = y/k+ 5/k +(5/k)^2 (x-5/k)^2 = (1/k)(y+5 +25/k) vertex at x = 5/k and y= -5-25/k I want k negative so that the function is negative for large +or - x I want the vertex at y = 0 -5 - 25/...
January 8, 2016

geography tourism maths literacy languages
When I was a student entering college I wanted to be a Naval Architect. However it was 1955 and physics was really, really exciting. Solid state physics and electronics was just happening and the space program was happening.... so I became a physicist. However I still wanted ...
January 8, 2016

maths
(x-a)^2 + (y-b)^2 = r^2 (5/2-a)^2 + (1/2-b)^2 = r^2 25/4-5a+a^2+1/4-b+b^2 = r^2 but a^2+b^2 = r^2 for (0,0) so 26/4 -5a - b = 0 5 a + b = 26/4 center lies on 2y=3x or through(a,b) 2 b = 3 a so 26/4 = 5 a + (3/2) a 26 = 20 a + 6 a = 26 a a = 1 b = 3/2 take it from there
January 8, 2016

math
altitude is max when angle is 90 degrees area = (1/2) base * altitude
January 8, 2016

science and technology
density of water = 1 gram/cm^3 1. weight in water is 0 2.volume = 100 cm^3 because it displaced 100 grams of water Therefore if neutrally buoyant it weights 100 grams in air. 3. Buoyant force = 100 grams . That was given. 4. volume = 100 cm^2 as we said
January 8, 2016

maths
sin theta = sqrt(62)/12
January 8, 2016

Physics
.25(6+14) = 5 5/.02 = 500/2 = 250 N a = F/m = 250 N/.25 = 1000 m/s^2 I get d.
January 8, 2016

Physics
change in momentum / 0.02
January 8, 2016

physics
g = v^2/r
January 8, 2016

Geometry
In other words if I am not carrying an umbrella, it is not raining. The biconditional would be I carry an umbrella if and only if it is raining. However you might carry one even on a sunny day.
January 7, 2016

Geometry
Right, if the statement is true, the contrapositive is true. statement If a cow, then a mammal converse If a mammal then a cow who knows? Inverse If not a cow, then not a mammal who knows? Contrapositive If not a mammal, then not a cow TRUE
January 7, 2016

math
http://www.jiskha.com/display.cgi?id=1452214976
January 7, 2016

Physics
F up m g down F = m a Fup - m g = m a so Fup = m (g+a) = 5.2 (9.81 + 4) Newtons
January 7, 2016

math
xxxxx xxxxx xxxxx xxxxx 4*5 = 20
January 7, 2016

Math
If you walk fist to school, then to the shop 3.25 *5280 = 17160 feet 17160 + 900 = 18060 feet or 3.42 miles
January 7, 2016

math and science both
I do not understand your question.
January 7, 2016

Physics
F = m a mg - Ffriction = m (3) so F friction = m(g-3) = 39 (7) = 273 Newtons
January 7, 2016

science
well, you are correct if you say displacement = 0 because vector is from 0 to 0 and distance = 1 mile
January 7, 2016

helpe plese
Well I suppose because people can plan evil deeds on social media and you can make your plans with others world wide. The practice raises questions of privacy though. I am not sure privacy appears in the first 10 amendments though although there certainly are laws defining and...
January 7, 2016

Math
maybe something like this. I do not see your picture. d = 3 h 2 d + 2 h = 64 feet 6 h + 2 h = 64 8 h = 64 h = 8 feet d = 3 h = 24 feet = 8 yards
January 7, 2016

Math
8 feet * 12 = 96 inches so ceiling is 96 + 2 = 98 98 - 64 = ?
January 7, 2016

math
four dimes = 40
January 7, 2016

Huh
Please check for typos and if you have presented the entire problem Obviously if you double the mass you double the gravitational force. Now do you maintain the same angle of the circumference to the hand? do you still have 50 N or do you have a new angle and rotational speed?
January 7, 2016

Math
yes, 77 - 75 = 2
January 7, 2016

Math
5'11" = 60 + 11 = 71 inches 71 + 6 = 77 inches which is how much longer than his bed?
January 7, 2016

Math
(14 + 14 + 7 + 7)8
January 7, 2016

Algebra
So am I. cost = 50 + 170 t where t is the time in hours however you show nothing on the benefit or value side of the equation. Obviously your lowest cost per hour is to use the maximum of four hours, spreading the 50 cleaning fee out over as many hours as possible. However ...
January 7, 2016

math
2 and 4 maybe ?
January 7, 2016

Physics
check below :)
January 7, 2016

Physics
energy in = i^2 R * t i^2 = 12.25 t = 4*60 = 240 seconds so energy in = 2940 R Joules energy to boil = 60 g * 540 cal/g = 32400 calories 32400 calories(.239J/calorie) =7744 Joules so 2940 R = 7744 R = 2.63 Ohms
January 7, 2016

Math
h = -9 + 16 h = 7
January 7, 2016

Math
What you typed is 11 h - 25
January 7, 2016

Do you mean 37 and 38 percent maybe?
This makes no sense as written.
January 7, 2016

History/social studies
I guess I would ask: "Why did the new US Government decide that it was important to spread west toward the Pacific from the Atlantic Coast? What would the US look like if that had not happened? This might help: http://www.ushistory.org/us/21b.asp
January 7, 2016

math
18 servings = 4+8+12 = 24 cups so there are (4/3)cups/serving 108 cups (3 servings/4 cups )=81 servings 8 cups oj/12 cups sel = (2/3) oj/sel
January 7, 2016

Maths
I think that is the height, not the distance, but it does not matter because with 45 degrees they are identical :)
January 7, 2016

Maths
The hypotenuse is 4 and the angle is 45 degrees? You can do it.
January 7, 2016

Math
here: http://davidmlane.com/hyperstat/z_table.html
January 7, 2016

math
4.6 - 3.8 = .8 5.4 - 4.6 = .8 we have a constant slope, straight line with slope of .8/1 = .8 so a - 5, 6, 7, 8, 9, 10 , 11 b - 3.8, 4.6, 5.4, 6.2, 7.0
January 7, 2016

P.E.
You are welcome :)
January 7, 2016

P.E.
Well, certainly physical :) http://en.wikipedia.org/wiki/Twerking
January 7, 2016

Math - Ms. Sue, Check!
Yes, that is the only choice that makes any sense.
January 7, 2016

Math - Ms. Sue, Check!
That would be 3870.80 though which is not one of the choices so I do not think whoever wrote the question thought that through :)
January 7, 2016

Math - Ms. Sue, Check!
1.06^3.5 = 1.226 1.226* 3250 = 3985.23
January 7, 2016

Physics
one revolution is 2 pi radians so one Rev/second = 2 pi radians/second
January 7, 2016

Intro to Chem
24.3/40.3 = x/12.1 trick question, no need to calculate mols or anything, just proportion.
January 7, 2016

Check My work ( math)
LOL, you plug the data into the software and ask for correlation coef.
January 7, 2016

Check My work ( math)
http://www.mathportal.org/calculators/statistics-calculator/correlation-and-regression-calculator.php
January 7, 2016

MATH
u = 5 c t = time upstream (5-t) = time downstream (u-c)t = 48 (u+c)(5-t) = 10 4 c t = 48 so t = 12/c 6 c (5-t) = 10 6 c (5 - 12/c) = 10 30 c - 72 = 10 30 c = 82 c = 2.7333 u = 5 c = 13 2/3 miles/hour ----------------------------- by the way t = 12/2.73333 = 4.4 hours so 5 - t...
January 7, 2016

History
..... maybe not to wage it of course :)
January 7, 2016

History
I am sure Ms. Sue knows much more about this than I. Go with her suggestions.
January 7, 2016

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