Recent content by pizzamakeren

A quick and simple question. I just realized that this has been posted in the wrong section, but ill give it a try anyway. Does anyone know if it's possible to diagonalize a hollow matrix? What i mean by a hollow matrix is a matrix with only zero entries along the diagonal.

I've rewritten the problem so that it might be easier to understand: Two balls lie on a table, each ball has a mass of m, and they are connected to each other with a cord that has a length of 2l. A constant force ~ F pulls in the midpoint on the string (x = 0), normally on the string's original...

unfortunately i haven't learned how to do this. I better check out how to do this.

The statement of the problem is as accurate as it can get. I've translated it from norwegian. Newtons second law says that F = m * a, which means i can get a equation for a. a = F / m What do you mean for each mass? The masses of the balls are the same, or am i misunderstanding something? I...

The problem that i am facing has to do with acceleration. The problem states that we have two balls with the same mass m that stands on two different tables. Between these balls are a wire with the length 2l, which i assume means 2 * l, where l is a value i choose. In the middle of the wire (x =...

Mass of elevator

F = 825 Im not sure what v0, Dw, ds, or dt means so i can't calculate the rest

it's going to stay at 2m/s after 3 seconds

It means it varies, Sometimes it's 1,9m/s and sometimes it's 2,1m/s

I have tried to solve a problem about the amount of watts a motor needs to recive if i want an elevator of 1250Kg to move at a speed of 2m/s +/- 0,10m/s after 3 seconds. The motor has an efficiency of 0,80. I've tried looking at my teachers uni recording, but it doesn't seem to explain this part...

It's about the same way we learn things, but we don't use the same system, we only write up the equations then cross out everything.

A gas with a volume of 8m^3 with a temperature of 400K gets warmed up to 550K with a constant pressure of 200Kpa. How much work has the gas done to the environment? I think i might need to use the ideal gas law for this which is: ( P * V / T = N * K ) Where V is volume, T is temperature and N...

Thanks for pointing that out. I wrote one more zero that i had to get rid of.

Sorry about that, i put in the wrong numbers. It should be alright now.

I see. Does the difference between initial and final temperature have to be something that i know from the beginning or is it something i can calculate? I tried solving the question and came up with this: QH2o = 4,18 * 10^3J * Kg^-1 * K^-1 * 2Kg * 100K P * t = Qh2o 2Kw * t = 836000J t = 836000J...