Modern Physics Exam 4 Review

In the half life equation, when you raise (0.5) to a power, what is that power?

• -(lambda)(time)

• t/thalf

• (lambda)(time)

• -t/thalf

If it takes 500 decays to measure a 0.1 Bq rate, how long would it take to make this measurement in seconds?

• 5000
• 1000
• 100
• 50

The Fermi energy is proportional to atoms/volume to what power?

• 2/3
• 1/3
• 3/4
• 1/2

To calculate the number of atoms per volume, you multiple avagadro's number times the density times what?

• molecular weight
• atomic weight
• molar mass
• mass number

The energy of a splitting over the magnetic field is what effect?

• Zeeman effect
• Bohr effect
• Compton effect
• Photoelectric effect

If you have a baryon on the left and no baryons after the reaction, what must be added to the left hand side?

• A baryon

• A anti-baryon

• An electron
• A muon

A meson has how many quarks?

• 3
• 2
• 1
• 4

What is the constant that converts u to MeV?

• 931.5
• 500
• 1000
• 1.5

Red shift goes toward what wavelength?

• Shorter wavelengths
• No shift in wavelength
• Shifts towards ultraviolet
• Longer wavelengths

How does one know about dark matter?

• Through its interaction with dark energy
• Through its electromagnetic radiation
• Through its gravitational effects on visible matter and the large-scale structure of the universe.
• Through direct observation with telescopes