The lowest energy level in an atom is
a. the absolute zero temperature.
b. the ground state.
c. the ionization level.
d. responsible for Doppler shifts.
e. the energy level from which the Paschen series of hydrogen originates.
B
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Time of flight (TOF) is routinely used to distinguish between different particle species. Calculate the difference in time interval required for a proton 
and a muon (rest mass: 106 
to travel 2.5m, if each have a momentum of 255 MeV/c.
A. 8 ns B. 15 ns C. 18 ns D. 10 ns
A meterstick is supported by a knife-edge at the 50.0-cm mark. Doug hangs masses of 0.48 and 0.76 kg from the 10-cm and 80-cm marks, respectively. Where should Doug hang a third mass of 0.25 kg to keep the stick balanced?
a. 64.4 cm b. 25.6 cm c. 74.4 cm d. 35.6 cm e. 50 cm
Blowing gently across the top of a soda pop bottle gives you a musical note at a certain fundamental frequency. This is most similar to
A. making a guitar string resonate at its fundamental. B. a wind chime. C. an organ pipe. D. a telephone.
Buoyancy: A barge with vertical sides is 10 m wide and 60 m long and is floating in fresh water of density 1000 kg/m3. How much deeper into the water does the barge sink when 3.0 × 105 kg of coal are loaded on the barge?
A. 25 cm B. 50 cm C. 75 cm D. 1.0 m E. 1.5 m