Recent content by jtm

T = 2pi * sqrt(m/k) and F = -kx? ok thanks!

Describe two different ways to determine the force constant of a rubber band only a 100g mass, a stopwatch, and a meter stick. I don't really understand what its asking but I don't have many formulas to choose from so I don't really know where to begin. I have like f = 1/T y = A * cos...

imagine a 8 letter word, how many possibilities are there to arrange letters in the alphabet (26) that start with BO(in that order) OR end with BO (in that order), if letters can be repeated? This is my work: 1 * 1 * 26 * 26 * 26 * 26 * 26 * 26 = 26^6 + 26 * 26 * 26 * 26 * 26 * 26 *...

i don't know the correct answer to your question, I'm sorry, I don't follow, I don't remember laws by names, I just know how to do them. Can you explain more clearly, I'm having a real hard time here :( Thanks!

The questions before it made me map the attractions of each ball to the other 2 balls. Are you saying I make 1 x,y axis and just put all the arrows and mark them like q1 on q2 etc then the net force can determine the acceleration. Isn't that confusing? When the 2 force magnitudes are the same...

I have an illustration that look like this: - + + on top of a cart. The charges are balls and are very light, and have equal maginitude charge. The rods supporting and connecting them are made with an insulating material and are also light. The cart rests on a smooth table. How would I draw...

I've tried using dot products but I don't see how I can represent that into a matrix. I don't see how doing a dot product of a matrix with a transposed matrix is even possible. Q dot product Q' is the identity matrix somehow.. wouldn't it be all 0s since the vectors are all orthogonal to each other?

I'm really really struggling on this question and am becoming very depressed from the stress that is being generated. http://www.math.rutgers.edu/courses/250/250C-f05/f05lab6.pdf Question 3 Part a) I've been stuck on it for hours. The last part where it talks about "show by algebraic...

rref = reduced row echelon formA = 3 2 9 6 7 9 6 5 18 15 6 6 4 9 12 27 8 2R = 1.0000 0 3.0000 0 0 0.7432 0 1.0000 0 3.0000 0 -1.2973 0 0...

Assume x = rand(1)*v1 + rand(1)*v2 + rand(1)*v3 where each v is obtained by the columns of the nulbasis(A) which are the solutions to Ax = 0, and that rand(1) is a random coefficient (scalar). Why would the rref(A) * x still be 0 when A * x is 0? Thank you!

Answer from what I have on key is 6.3 m/s I am getting 19.8 m/s with mass cancelling out. We don't have a :) I'm assuming 0.

Always ALL the information provided is used in the calculation. Also, it gives the wrong answer ;) I checked.

This problem I have to do is really bothering me. Your 1600 kg PT Cruiser moves around a level 50m radius road. The coefficient of STATIC friction between the car tires and the road is 0.80. Determine the MAX speed of the car so that it does not skid off the road. I think I get somewhere...

S = Columns 1 through 3 1.0000 0 0 0 1.0000 0 0 0 1.0000 Columns 4 through 5 0.2750 -0.2786 -0.1750 0.5929 0.2250 0.1357 Which is the rref of A = 2 9 9 1 6 2...

Identify any errors in the solution to the following problem and provide a corrected solution if there are errors. The problem A 1000kg elevator is moving down at 6 m/s. It slows to a stop in 3 m as it approaches the ground floor. Determine the force that the cable supporting the elevator...