A planet whose distance from the Sun is 3 AU would have an orbital period of how many Earth-years?
A) 3
B)
C)
D) 9
E) 81
B
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A charged particle is observed traveling in a circular path of radius R in a uniform magnetic field. If the particle were traveling twice as fast, the radius of the circular path would be
A) R/2. B) 8R. C) R/4. D) 4R. E) 2R.
Two wires with the same resistance have the same diameter but different lengths. If wire 1 has length L1 and wire 2 has length L2, how do L1 and L2 compare if wire 1 is made from copper and wire 2 is made from aluminum? The resistivity of copper is 1.7 × 10^–5 W•m and the resistivity of aluminum is 2.82 × 10^–5 W•m
a. L1 = 0.36 L2 c. L1 = 0.60 L2 b. L1 = 2.8 L2 d. L1 = 1.7 L2
Along with the pH scale, there is the pOH scale, which indicates the level of "basicity" in a solution. Accordingly, pOH = -log[OH-]. What is the sum of the pH and the pOH of a solution always equal to?
A) the negative of the product of the hydronium and hydroxide ions B) the negative log of KW, which is 14 C) The sum would equal 7, since that would be neutral for pH and pOH. D) It is not constant because it depends on the acid/base solution in question.
Isaac Newton guessed that gravity works by an inverse square relation because he had already discovered that light behaves this way
Indicate whether the statement is true or false