Recent content by vorse

Ok, I figured out the answer. I think it's answer choice C. It's just my answer has something like 2c as one of the constant, and I guess the answer choice reduce it down to just C. Btw, I didn't graph the equation; it is a homogenous equation and can be solve that way; just the algebra...

Bump* Don't know the rule for bumping threads, but if this is illegal, I'll never do this again.

all i got to is [ A/ k-αa (2gh(t))^1/2 ] dh = dtsee the A is divided by ( k-αa (2gh(t))^1/2) so, in a clearer way to write it [A / ( k-αa (2gh(t))^1/2)]dh = dt btw, what programs are out there where I can type math equations on the comp?

well, I tried separating the denominator into the form f(x) = A/cx+d +B/dx+e, etc... i think it's called partial separating integration or something, not sure, but that didn't work out. I think I'm here is because I don't know how to integrate the following equation.

I was afraid you'd said I have to graph the equation; I can never make heads to tail of what I draw out.

A and a are different; they are both constant however, so it shouldn't matter much in the integration; "The LHS is of the form (P + Q√h)dh … so just integrate it." what do you mean by this form? If i let u = P+Q√h then du = 1/2Q(h)^-1/2 right? and this substitution doesn't work. I...

0 = -39t - 156.8e^(-1/4)t + 156.8 ; after substituting m = 10kg ; g = -9.8; and k = 2.5 sorry, forgot the t from this equation; if you follow the work I did, you'll see. Still, not sure how to solve for t

Homework Statement Water is pumped into a cylindrical tank with cross section area A at a constant rate k, and leaks out through a hole of area a in the bottom of the tank at the rate αa (2gh(t))^1/2 where g is the acceleration due to gravity, h(t) is the depth of water in the tank at...

Homework Statement An object with mass 10kg is dropped from a height of 200m. Given that the constant k in the equation is 2.5Nsm^-1 mv'(t) = −mg − kv(t) approximately how many seconds does the object hit the ground? Homework Equations v' + (k/m)v = -g The Attempt at...

Homework Statement Which of the following is the set of orthogonal trajectories for the family indicated by (x-c)^2 + y^2 = c^2 a). (x-c)^2 + y^2 = c^2 b). (x-c)^2 - y^2 = c^2 c). x^2 + (y-c)^2 = c^2 d). x^2 - (y-c)^2 = c^2 e). None of the above Homework Equations...

Yea, this was the rule I was looking for. Thanks a lot Pion.

I know what the answer it. I just don't know how the answer key got there. There are some rules that constrain the addition/subtraction of magnitude of vectors, but I don't know what they are. I am searching the net but to no avail.P.S Thanks for the welcome.

Homework Statement A vector of magnitude 20 is added to a vector of magnitude 25. The magnitude of this sum might be: A. Zero B. 3 C. 12 D. 47 E. 50Homework Equations Probable the Pythagoreans and use of sin, cos, etc. The Attempt at a Solution Not sure...