Which of the following industrialized democracies is the least efficient in its use of energy?
A) Great Britain
B) Japan
C) Italy
D) West Germany
E) United States
E
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A singly charged 9Be ion is accelerated from rest through a potential difference of 8000 V. The ion is then sent into a mass spectrometer where the radius of the path is 29 cm. What is the magnetic field in the spectrometer?
A. 0.27 T B. 0.13 T C. 0.067 T D. 0.0028 T E. 0.00019 T
Series/Parallel Circuits: As more resistors are added in series to a constant voltage source, the power supplied by the source
A. increases. B. decreases. C. does not change. D. increases for a time and then starts to decrease.
A molecule of roughly spherical shape has a mass of 6.10 × 10-25 kg and a diameter of 0.70 nm. The uncertainty in the measured position of the molecule is equal to the molecular diameter
What is the minimum uncertainty in the speed of this molecule? (h = 6.626 × 10-34 J ? s) A) 0.78 m/s B) 7.8 m/s C) 78 m/s D) 0.078 m/s E) 0.0078 m/s
The clock on the Big Ben Tower in London reads 12 noon. If you travel away from the clock at a very high speed and view it with a telescope, you would see
A) run slower than a clock in your vehicle. B) run faster than a clock in your vehicle. C) be frozen at 12 noon.