The atomic number (Z) of an element is equal to the number of ______________ in one of its atoms
a. protons
b. neutrons
c. protons plus neutrons
d. neutrons plus electrons
a
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Resistance and Resistivity: Consider two copper wires of equal length. One wire has twice the cross-sectional area of the other. How do the resistances of these two wires compare?
A. The thicker wire has twice the resistance of the thinner wire. B. The thicker wire has eight times the resistance of the thinner wire. C. The thicker wire has one-half the resistance of the thinner wire. D. The thicker wire has four times the resistance of the thinner wire. E. The thicker wire has one-fourth the resistance of the thinner wire.
The idea that our inherited tendencies influence the probability that we'll encounter stressful life events is a characteristic of _________.
Fill in the blank(s) with the appropriate word(s).
Comparing the size of a wavelength of light with the size of an atom,
A) some atoms are are larger than a lightwave, but others are small than a lightwave. B) atoms are much smaller. C) atoms are much larger. D) they are about the same size. E) some lightwaves are larger than atoms, but others are smaller than atoms.
The size of the Earth's orbit is doubled. This will allow the parallaxes of more distant stars to be measured
Indicate whether the statement is true or false