Addition of an electron to an atom leaves a
a. neutron.
b. positive ion.
c. free quark.
d. negative ion.
d
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Faraday's law of induction and Lenz's law are actually the same law stated differently
Indicate whether the statement is true or false
Emission nebulae are created by gas absorbing ultraviolet energy from the hot young stars within them, such as in the Orion Nebula
Indicate whether the statement is true or false
Give an example of a material whose useful property depends upon a metastable state
What will be an ideal response?
Carbon-14 Dating: Modern in-air nuclear bomb tests have created an extra high level of 14C in our atmosphere. If future archaeologists date samples from this era, without knowing of this testing, will their carbon-14 dates be too young, too old, or correct? If correct, why?
A. Too young. B. Too old. C. Correct, since 14C from bomb tests is different from that produced naturally. D. Correct, because modern biological materials do not gather 14C from bomb tests.