Recent content by LocalStudent

Hi I'm working through some example question and the memo leaves out this question. I was hoping someone can help me out. The question: Construct a differential equation of the form y'' + by' + cy = 0 which has y(t) = e^t cos(3t) as one of its solutions. What I did: First I found the...

I got a very basic laptop which I just use for browsing (facebook, twitter, news etc.) Specs: Intel Atom Processor 1.66GHz 512kb cache 1GB RAM Ubuntu operation system It's perfect for just browsing, basically its only purpose, but when I watch youtube videos it lags. I've tried letting...

ok, I see. Thanks for the help.

So is the question basically asking "What is the angle between (A+C) and B?"

Homework Statement The following are all vectors: A = <2, 1, 1> B = <1, -2, 2> C = <3, -4, 2> Find the projection of (A + C) in the direction of B Homework Equations Dot product? The Attempt at a Solution I was not sure what the meant in this question. I added A and C...

Thanks again! This exact question came up in my math test :)

Thanks, that was really helpful. I hope I remember and notice it in my test.

Homework Statement ∫(sec^2 x tanx) dx the integral is from 0 to ∏/3 Homework Equations I tried using integration by parts The Attempt at a Solution When I did integration by parts I got to this: tan^2 x - ∫(sec^2 x tanx) dx (integral also from 0 to ∏/3) which...

I've used kelvin. And mass in kilograms. Thanks for the input. I'll post the actual question later and you could see if I've done it correctly or not.

Thanks. Then I must be going wrong somewhere else.. I'm sure I'll find it. Thanks again

I'm busy solving a physics question and I am getting unexpected results. I just want to check if I am using the right constant in this equation: I am using the equation to find the Root Mean Squared speed = √(8/3∏) √3kT/m Is k in this equation the boltzman constant? (1.4e-23)

Thanks, Infinitum.

Homework Statement A mass of 0.3kg hangs motionless from a vertical spring whose length is 0.8m and unstreteched length is 0.65m. The mass is then pulled down so the spring has the length of 0.9m and given an initial speed upwards of 1.2m/s upwards. What is the maximum length of the...

So what if you were comparing the effects of the 50g tennis ball and a 50g lump of clay?

Just say I decide to close my door by throwing a tennis ball or a lump of sticky clay at the door. Both have the same mass. I would say throwing the lump of sticky clay would be more effective. Is this due to the conservation of momentum or kinetic energy? Because the clay does not bounce...