my length in five digits long, but I do tend to mix up my exponents. So I might be off by an order of magnitude or two...or three.
I think I might have found my mistake. My answer it 3 digits and adds up to 15
... I am going to figure it up on more time just to be sure.
im gonna give another hint to my answer but hopefully you don't post it here. yeah, my digits add up to 15 too.
catfood wrote:im gonna give another hint to my answer but hopefully you don't post it here. yeah, my digits add up to 15 too.
Yay!
I hope I am right then, though there are a several numbers between 100 and 199 that add up to 15
Oh well, I'm happy I even got close.
i have a question
what do you do to the answers u get from the equations?
V1 = 4/3 * pi * (r1)^3
V2 = 4/3 * pi * (r2)^3
ThezeR2HarD wrote:i have a question
what do you do to the answers u get from the equations?
V1 = 4/3 * pi * (r1)^3
V2 = 4/3 * pi * (r2)^3
We use that to put into the last equation:
h/3* V2 + A*h = m/d - V1
catfood wrote:ThezeR2HarD wrote:i have a question
what do you do to the answers u get from the equations?
V1 = 4/3 * pi * (r1)^3
V2 = 4/3 * pi * (r2)^3
We use that to put into the last equation:
h/3* V2 + A*h = m/d - V1
ok thanks but my problem is that i dont known how to do the rest of the problem
wait when you divide mass by density, do u use 7800 as the density?
This is a puzzle solving site and not a Neopets site so all puzzles can be solved here and the answers posted without having to give silly hints and stuff
Perhaps there is a Neopets forum where you can do that sort of thing?
yeah, the unit is in kg and meter so we have to use 7800
can anyone confirm this?
rho = F /A
rho = 400,000,000 kg/m*s^2
rho is stress, F = force, A = cross area of bar
A = 5/4*t^2*tan(54) (54 is degrees)
t = 0.02 m
F = rho * 5/4*t^2*tan(54)
F = m*g
m = F /g
g = 9.81 obviously
m = (mass of big sphere) + (mass of little spheres) + (mass of bar)
mass of little spheres = l/3*(mass of 1 little sphere, which is volume of little sphere * d) (l = length of bar rounded down)
mass of bar = A*l*d (d = density which is 7800 kg/m^3)
mass of big sphere = d*(volume of big sphere)
volume of big sphere = 4/3 * pi * (.25m)^3 (the .25m is the radius of the big sphere)
volume of bar = 4/3 * pi * (.15m)^3
if we multiply out by the densities we get
(volume of big sphere) + (l/3)*(volume of little sphere) + A*l = m/d
(l/3)*(volume of little sphere) + A*l = m/d - (volume of big sphere)
now we solve for l (the length it can be)
l = (m/d - (volume of the big sphere))/((volume of little sphere)/3 + A)
(volume of big sphere) = 0.0654497917
(volume of little sphere) = 0.014137155
F = rho * A
F = 275276.384
m=F/g
m =
l = (28060.7935/7800 - (0.0654497917)) / (0.014137155/3 + 0.00068819096)
i found this from somewhere else..to get rid of those silly hints that makes the world harder to live in...
rho = F /A
rho = 400,000,000 kg/m*s^2
rho is stress, F = force, A = cross area of bar
A = 5/4*t^2*tan(54) (54 is degrees)
t = 0.02 m
F = rho * 5/4*t^2*tan(54)
F = m*g
m = F /g
g = 9.81 obviously
m = (mass of big sphere) + (mass of little spheres) + (mass of bar)
mass of little spheres = l/3*(mass of 1 little sphere, which is volume of little sphere * d) (l = length of bar rounded down)
mass of bar = A*l*d (d = density which is 7800 kg/m^3)
mass of big sphere = d*(volume of big sphere)
volume of big sphere = 4/3 * pi * (.25m)^3 (the .25m is the radius of the big sphere)
volume of bar = 4/3 * pi * (.15m)^3
if we multiply out by the densities we get
(volume of big sphere) + (l/3)*(volume of little sphere) + A*l = m/d
(l/3)*(volume of little sphere) + A*l = m/d - (volume of big sphere)
now we solve for l (the length it can be)
l = (m/d - (volume of the big sphere))/((volume of little sphere)/3 + A)
(volume of big sphere) = 0.0654497917
(volume of little sphere) = 0.014137155
F = rho * A
F = 275276.384
m=F/g
m =
l = (28060.7935/7800 - (0.0654497917)) / (0.014137155/3 + 0.00068819096)
l = 654.020583
Then you round l and plug it into the previous forumla
l/3* (volume of the small sphere) + A*l = m/d - (volume of the big sphere)
l/3 * 0.014137155 + 0.00068819096 * l = 28060.7935/7800 - 0.0654497917
l/3 * 0.014137155 + 0.00068819096 * l = 3.53208784
If the left < the right add 1 to l, if it's >, take away one from l, the largest l you get without going over is the answer
(but you don't have to go any higher then 654 which you got for l)
i went with this answer and put 654
ok i get how to do the whole thing but i use a calculator to calculate and it gives me a number like 6.881.......e-4 as A. what would A be in numeral form?
princess, it is between 100 and 999
654? thats not what i got.
thats your answer..but thats not what the others solved..im just trying to help and not make the confusion a rat runaround thank you
roxiegirl wrote:princess, it is between 100 and 999
I know, thats what I meant.
walsh, to clarify, people on this board do like to make other people work a LITTLE bit before posting the answer.
