A 100 eV electron and a 100 eV proton have equal de Broglie wavelengths
a. True
b. False
Indicate whether the statement is true or false
False
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The total mass of galaxies in a cluster of galaxies divided by the number of galaxies in the cluster can be used to determine a typical galaxy's ___________
a. luminosity b. distance c. mass d. diameter e. age
When the air of a fully-inflated party balloon quickly escapes, its temperature
A) drops. B) rises. C) remains unchanged. D) none of the above
You are designing a generator with a maximum emf 8.0 V. If the generator coil has 200 turns and a cross-sectional area of 0.030 m2, what would be the frequency of the generator in a magnetic field of 0.030 T?
A) 7.1 Hz B) 7.5 Hz C) 8.0 Hz D) 22 Hz E) 44 Hz
When a boat sails from fresh water to salt water, the boat will float
A) lower in the water. B) higher in the water. C) at the same water level.