Recent content by burg25

Yeah I got it. Thanks

Wait I think I understand. Are you saying take e raised to this value?

What do you mean? Could you clarify?

Homework Statement 1. Homework Statement The temperature of the surface of a certain star is 8000 K. Most hydrogen atoms at the surface of the star are in the electronic ground state. What is the approximate fraction of the hydrogen atoms that are in the first excited state (and therefore...

Homework Statement I have an exam on Monday and do not know how to do this example problem. Use the following information to calculate the first ionization energy of Li. LiF(s) → Li+(g) + F −(g) 1050 kJ/mol LiF Li(s) + ½ F2(g) → LiF(s) −617 kJ/mol Li F2(g) → 2 F(g) 160 kJ/mol F2 Li(s) →...

Isn't a positron basically massless considering it would just have the mass of an electron or will it make a big difference?

Homework Statement Find the binding energy for hydrogen in kJ/mol through positron emission. 4(11H) → 42He + 2(0+1ß) Homework Equations E=Δmc2 Mass of Hydrogen: 1.0079 amu Mass of Helium: 4.0026 amu 1 amu = 1.6605 x 10-27kg The Attempt at a Solution Here is what I did: Eb=...

Thank you alphysicist.

Ok so I should sum the forces in the x and y directions. This would give me the equations Fx= Tb - \mumg = 0 for the x since the system is stationary and the y equation would be Fy= Fg=FN. So then I could rewrite the x to be Tb = \mumg. So then I would plug this value in for Tb in the...

Would you be able to see the figure if I emailed the figure to you? I do not know how to start the second, so I'm kinda lost there.

[b]1. Homework Statement Hey I was wondering if someone would just check over this bonus question for me. 1) A father pulls his child on a sled by pulling on rope over his shoulder. He exerts a force of 50 N at an angle of 30*. a) Using the coefficient of friction for steel on ice, calculate...