Let's consider the hydrogen atom with one electron. If we observe the energy the result is always one of the eigenvalues even if the statefunction is arbitrary. I accept that. But why is the atom always treated as if the electron is in one of the eigenstates? Why is the statefunction always...
I agree with you that there will be difficulties when you split up from a cohabitation (as from any partnership, e.g. business, that's life), but it's when you split from "legal marriage" that things get really messed up and ugly.
Underneath I have copied some lines from news articles about...
If you can't get what you want, settle for what you can get
Well, you are a little naive if you think your spouse married you because she liked you more than anyone else - possibly she married you because she, at the time, liked you more than anyone else of those she could get...
Can't two parties give and receive without a governmental involvement?
Can't they cultivate the seeds on their own?
Giving and receiving tender loving care - doesn't that work without governmental regulations?
If there is love - just live together, and if you want others to know that you are...
Marriage as a legal contract endorsed by the state is (or should be) obsolete. Marriage should only be a voluntary ceremony without legal implications if you want to announce that you are living together.
Problem 6
Potential energy at start = energy loss due to friction + potential energy of spring at the moment when the body is at rest
mgh = \mu mg L + \frac12 k x^2
Problem 5
(a) For this motion, determine the change in the block's kinetic energy
Calculate kinetic energy with initial speed v0=8 m/s and then with finel speed v=0. The difference is what they ask for.
(b) For this motion, determine the change in potential energy of the block-Earth...
Problem 4.
(a)
String potential energy is U_s =\frac12 \cdot k \cdot x^2
Kinetic energy is KE = \frac12 \cdot m \cdot v^2
U_s=KE should give you v.
(b)
Energy lost due to friction is W_{fr}= F_{fr} \cdot x = \mu \cdot mg \cdot x
The friction force is (almost) independent of speed -...
I see that I made a mistake in problem 1. I didn't put the mass into the formula for the kinetic energy.
Should be T_A = \frac 12 \cdot m \cdot v^2.
:blushing:
Problem 3.
Use these general relations
Hooke's law F = -(k/L)x
Gravitation on body F = mg
Potential energy in cord U = ½*(k/L)x^2
Potential energy of body U = mgh
Use Hooke's law and "hanging at rest from a 5.00 m length of the cord, he finds that his body weight stretches it by 1.30 m"...
I think it's great that people stick together if they like it. I also think it's a great idea that they announce this by some ceremony, named e.g. marriage, to let the world know that they want to be considered as a union in social life and that the shop is closed for new relationships of the...