Part of a wooden ancient ship is found to be 1/3 as radioactive as wood freshly cut from a tree. The age of the ship is likely about
A) one-third of carbon-14's half-life.
B) three times carbon-14's half-life.
C) more than three times carbon-14's half-life.
D) none of the above
Answer: B
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The type of radiation that fogged Becquerel’s photographic plates was probably
A. Alpha radiation. B. Beta radiation. C. Gamma radiation. D. Either alpha or beta radiation. E. Either beta or gamma radiation.
The person who developed the exclusion principle was __________
Fill in the blank(s) with correct word
An x-ray photon with wavelength 15.0 pm is scattered at 84.0? by an electron. What is the resulting kinetic energy of the electron?
A. 568 keV B. 59.5 keV C. 30.1 keV D. 15.0 keV E. 10.5 keV
Consider two long, straight parallel wires, each carrying a current I. If the currents are flowing in opposite directions:
a. the two wires will attract each other. b. the two wires will repel each other. c. the two wires will exert a torque on each other. d. neither wire will exert a force on the other.