Recent content by ljucf

Thank you for your help!

So now I take (2.8)(4) + 21.32(.63) and divide that by moment of inertia?

So is the Rotational angular momentum = Iω

According to my textbook, Rotational angular momentum = (MR2/2)ω Therefore, I divided it by two. Is that incorrect?

Homework Statement A disk of radius 0.41 m and moment of inertia 2.8 kg·m2 is mounted on a nearly frictionless axle. A string is wrapped tightly around the disk, and you pull on the string with a constant force of 52 N. What is the magnitude of the torque? torque = 21.32 N·m After a...

I solved it. -13.6/42+13.6/32=.66

I have know idea...I am using the equations that were given in class.

I worked them out.

En=K+Ue=-13.6eV/N2 -13.6/No2+13.6=12.8 No2= -13.6/0.8= -17 √(17) ≈ 4 -13.6/42+13.6=12.75

Due to the fact that the questions says 12.8eV is the ground state, wouldn't that result in 12.8 being the highest energy photon?

Homework Statement (a) What is the minimum kinetic energy in electron volts that an electron must have to be able to ionize a hydrogen atom (that is, remove the electron from being bound to the proton)? Answer: 13.6 eV (b) If electrons of energy 12.8 eV are incident on a gas of hydrogen...