Recent content by stosw

I've been currently playing around with a toy quad-copter that you can write your own programs for and was attempting to make it go to a set of coordinates that are specified. I was wondering if someone could help me design a controller for the yaw component. I am currently calculating the...

Homework Statement Roll a fair die until the first time you roll a '5' then stop. Let X be the number of times you rolled the die. What is the probability that X is divisible by 3? Homework Equations E[X] ? The Attempt at a Solution I honestly have no idea how to even approach...

All the info given in [1] is what was given for the problem, I forgot to say that I am suppose to find the expected value, var[x], and the distribution on x. I honestly have no idea what I am doing. Any hints would be great.

Homework Statement Suppose X is a discrete random variable whose probability generating function is G(z) = z^2 * exp(4z-4) Homework Equations No idea The Attempt at a Solution I'm thinking that due to the exponent on the z term, that the exp(4z-4) would be the P[X=3] =...

Homework Statement I have an image similar to the one given here with two types of material inside of it and I need to have at least one voxel in the image is entirely type B material (The smaller inside material). I am given all the dimensions on the material A and B but not told where...

After many hours of getting no where, I realized that the correct method to solve this problem is Reduction of order. The answer is y2(t) = 1/t.

Homework Statement Given that y1(t) = t is a solution of t2y'' + ty' - y= 0 find all solutions. The Attempt at a Solution I already put it into mathbin asking somewhere else for help and it doesn't look like i can copy paste that syntax to here. http://mathbin.net/56336 Could...

Homework Statement I don't know how to fill in the following k-maps [PLAIN]http://img502.imageshack.us/img502/7339/dsc00767mn.jpg Homework Equations The Attempt at a Solution The onyl way I know how to fill in a k-map from a table like that is to go down the present state and...

Homework Statement I'm trying to simplify the following to only use XOR and OR gates. x = ab'c'd' + a'd + a'c + a'b The Attempt at a Solution My only thought would be to x = ab'c'd' + a'd + a'c + a'b x = ab'c'd' + a'(d + c + b) But I have no idea what else to do. Can anyone...

Homework Statement dy/dx = y^3/(1-2xy^2) The Attempt at a Solution I converted it to this form: (-y^3)dx + (1-2xy^2)dy = 0 My = 3y^2 Nx = -2y^2 so My =/= Nx Finding the integrating factor: (Nx - My) / M \frac{-2y^2 + 3y^2 }{-y^3} = \frac{-1}{y} e\int(-1/y)dy\...

Homework Statement The question states: Design a combinational circuit that accepts a 3-bit number and generates a 6-bit binary number output equal to the square of the input number.The Attempt at a Solution How would I make a truth table for this? > Yes Have it have 3 inputs? > Yes What...

Thanks. Guess I should be more careful when using a calculator. Correct answer is 98.596 pF/m

Homework Statement A coaxial cable used in a transmission line has an inner radius of 0.15 mm and an outer radius of 0.65 mm. Calculate the capacitance per meter for the cable. Assume that the space between the conductors is filled with polystyrene. (Also assume that the outer conductor is...

I'm almost positive the pigeon is moving only in the direction of the y-axis. You're right they don't have equations, lol. The pigeon's position Q=(0,g(t)) where i found g(t) = -2000 + 50t. Could I then say something like the hawk's position P = ( j(t), k(t) ) where j(t) = 3000 - 90t and k(t)...

Homework Statement Suppose that a hawk, whose initial position is (a,0)=(3000,0) on the x-axis, spots a pigeon at (0,-2000) on the y-axis. Suppose that the pigeon flies at a constant speed of 50 ft/sec in the direction of the y-axis (oblivious to the hawk), while the hawk flies at a constant...