Recent content by magicuniverse

someone please help!

So = N/sqrt(4piDt) * exp(-x^2/4DT)dx ? If that's right I don't know how to do the sencond part. I know that since expx^2 term the distirbution is gaussian and that it can be normalised to 1. However what do i get for an answer?

Homework Statement The solution to the diffusion equation in 1D may be written as follows: n'(x,t) = N/sqrt(4piDt) * exp(-x^2/4DT) where n'(x,t) is the concentration of the particles at position x at time t, N is the total number of particles and D is the diffusion coefficient. a)...

no sorry I am lying i get lambda to be 0.6 so t =0.96s is this right? and i also get the distance to be 2.09m is that correct?

i get 5/3 for lambda. is that wrong?

but putting all the numbers into the formula you gave me gives 2.67s? what am i doing wrong?

t' = (t-ux/c^2)/root(1+u^2/c^2) is it wrong?

I plugged numbers into a fomula in my book.

Simply from the twins paradox thing I am going to say that the time is shorter for the moving ufo. So the time will be 1.25s right?

and for the other time i get 2.67s is that right?

No. What's the distance? What's the speed? the distacne is 384000000m and speed is 0.8*3ee9 when i put this into my calulator i get 1.6

kk so I know that speed =distance/time so time = distance/speed = 4.8 seconds. Is that right?

can someone tell me if I am posting this in the wrong place at least lol?

come on surely someone can help me with this?

Homework Statement a ufo travels from one planet to another (distance measured 384000km) at v=0.8c. 1)How long does the trip take according to observer on planet left? 2)How long does the trip take according to observer in ufo? 3) What is the two planets distance measusured my...