Recent content by jus8727

how to u do know that 1+1+1...n times isn't just one? we don't know how addition is defined?

im in a good mood sorry if u get affended i really appericate the help but i dissagree i a few things

how do u know what happens when u add to numbers, how do u know that they get larger define larger. we may not be dealing with numbers all we know is that its a ring. we don't know what 1 is it is just the muliplictive inverse. it may not be a number

you are assuming that we are dealing with numbers and with our normal addition. addition can be defined in any way. that's my problem just because it is a ring does not mean we are dealing with numbers or at the least the regular def of addition and multiplication

prove that a finite ring with identity has characteristic n for some n>0. been trying for a while getting nowhere any ideas?

what does it mean for momentum to be constant of motion. i know that if it is it will commute with the hamiltonian but what does it mean in words?

um u could do that or reg kinetic

oh got it thanks a lot guys!

i think the problem is i don't know what to do when we have an additon in the commutator i don't know how to treat it

samal where is the h bar term? is that a property of commutator i have never seen that before

um is there an easier way? like the first respnse seems right but idk how to get there its an elementary problem that i have I am sure

yes that's what I am doing but I am still getting zero

thats how i started but didnt arrive at that can u show a little bit more detail if u don't mind. thanks a lot though

um calulate the engery needed to jump that high then find out the highest a human can possibliy jump?

consider a general one dimensional potential v(x) drive an expression for the commutator [H,P] where h is hamiltonian operator and momentum operator. i keep getting zero and i don't think i should. since next part of homework question sais what condition must v(x) satisfy so that momentum will...