Recent content by Andrea2

You can try with Stanford video lectures. You can find these lectures on youtube, write Leonard Susskind (the professor) lecture number "n" . You'll find lectures on classical mechanics, quantum mechanics, cosmology and so on...:smile:

i don't know exactly what happen if i raise a real number to the power of an angle, i tried to answer also to this question, but five minutes ago i think I've found the answer to my first question, and i think that this problem is more difficult with real numbers than with complex! My solution...

is there anyone who can tell me what happen when i raise a complex number to the power of an angle in rad? for example, what is the result of (i)^1rad?

But why my in my first post i didn't found the correct answer?

the lengt of the cord L is given by 2Rsin(b), so we compute sin(b)=(8Lh)/(L^2+4h^2). So cos(b)=sqrt(1-sin^2(b)), but the result i obtain in this way is that the sqrt of the denominator is correct, but the numerator is different because i obtain sqrt(L^4+4h^4-56L^2h^2) that is different by...

p+q is an even number, so we have that there are two factors: 2 and a (even or odd) number. (p+q)/2 could be even or odd. If it's even we have that the sum of two consecutive prime numbers can be written as (2)x(2)x(number). If it's odd we have that it isn't a prime numbers because there isn't...

if p and q are consecutive there isn't any prime number that is "between" the consecutive prime numbers p and q, so (p+q)/2 isn't a prime number.

ok, thank you very much!

Hi! I'm new of this forum and I'm searching a way to understand why the action is E-U, but in this moment i don't know how to do...ther's someone who can help me? Thank you