The uncertainty in the position of a proton is 250 pm. What is the minimum kinetic energy of the proton when its position has been measured to this precision?
A. 41 MeV
B. 83 MeV
C. 21 MeV
D. 5.2 MeV
B. 83 MeV
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In the context of the rings of Saturn, the F ring is clumpy and sometimes appears braided because:
A) of two shepherd satellites. B) resonances with moons remove the gaps in the ring. C) straying particles are gravitationally pulled out of the ring. D) shepherd satellites are absent.
The ____________________ of a star can be determined from its color
Fill in the blank(s) with correct word
A new electric power plant has an efficiency of 42%. For every 100 barrels of oil needed to run the turbine, how many are essentially lost as waste heat (in barrels of oil) to the environment?
a. 21 b. 42 c. 58 d. 10 e. 79
A passenger is on a spaceship traveling at 0.8 c. The passenger observes that her watch
A. is running slow. B. is running fast. C. is keeping time as usual. D. is running slow if the ship is traveling in the positive direction. E. is running slow if the ship is traveling in the negative direction.