The value of the gravitational acceleration on the surface of Venus is 8.87 m/s2. What is thenormal force acting on a 50 kg astronaut standing on the surface of Venus?

A hydrogen atom is in a d In the absence of a magnetic field all the d states have (approximately) the same energy.  If you put the atom into a 0.600 T magnetic field that is in the z direction, calculate the splitting of the electron levels.  

In Xenon (Z=54), what is the effective charge experienced by an electron in the M (n=3) shell?

The contention for the usage of a hardware device is called ______

For the code sequence below, state whether it must stall, can avoid stalls using only forwarding, or can execute without stalling or forwarding.                   lw $t0,0($t0)                   add $t1,$t0,$t0

Measurements of a certain isotope tell you that the decay rate decreases from 8279 decays/minute to 3066 decays/minute over a period of 4.50 days.  What is the half-life of this isotope?  

Draw an energy level diagram that shows the energies of a d orbital with and without an external magnetic field.

Which of the following are correct?  Please specify all that apply. In a semiconductor, there are electrons in the conduction band even at absolute zero. The conductivity of a semiconductor can be increased by using photons to excite electrons from the valence band into the conduction band. To do this, the photon energy must be at least as great as the band gap; lower energy photons will not be absorbed. A semiconductor has the same band structure as an insulator, but a smaller gap between the valence and conduction bands. As the temperature of a semiconductor increases, the population in the conduction band increases very rapidly, as does the electrical conductivity. A semiconductor at absolute zero has an empty conduction band above the full valence band.

Pure germanium has a band gap of 0.67 eV.  The Fermi energy is in the middle of the gap.  For a temperature of 270 K, calculate the probability f(E) that a state at the bottom of the conduction band is occupied.

  undergoes alpha decay.  What is the resulting nucleus?