Quantum Mechanics Answers

Calculate the threshold wavelength, in nm, of a metal if that metal emits an electron with a kinetic energy of 6.32 x 10-19 J when illuminated with light that has a frequency of 1.97 x 1015 Hz. 

If barium has a threshold frequency of 6.07 x 1014 Hz, calculate the kinetic energy of the electron emitted when barium is illuminated with a wavelength of 385 nm. 

Construct an oracle with five qubits, which identifies (ie. applies a phase to) numbers which are squares 

(0, 1, 4, 9, 16, and 25) less than 32. You may use multiply controlled operations.  How to do this?

Is animatter influenced by gravity? Is there a way to contain or to increase animatter in any one space?

What is total angular momentum

Light takes 4.5 years to reach us from the nearest star. If the velocity of light is 3 ×10^8 ms-1, how far away is the star? A rocket first outside the Earth’s atmosphere in space accelerates at 30ms-2 for a week (7 days). How long will it take for the rocket to reach the star? (Ignore any gravitational attraction).

Explain WKBmethod in words

 Two small metal spheres are 30.0 cm apart. The spheres have equal amount of negative charges and repel from each other with a force of 40.0 N. What is the charge on each sphere?

Calculate the momentum of a proton whose kinetic energy is 200 MeV.

Calculate the kinetic energy of a proton whose velocity is 0.8c.