Molecular Speeds: The absolute temperature of a gas is T. In order to double the rms speed of its molecules, what should be the new absolute temperature?
A. 4T
B. 2T
C. T
D. 8T
E. 16T
Answer: A
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A) right. B) left. C) front. D) back. E) none of the above
Capacitors in Combination: A 1.0-µF capacitor and a 2.0-µF capacitor are connected together, and then that combination is connected across a 3.0-V potential source (a battery). What is the potential difference across the 2.0-µF capacitor if the capacitors are connected (a) in series or (b) in parallel?
Fill in the blank(s) with the appropriate word(s).
Which of the following statements is true of the angles of incidence and reflection?
a. They are not related b. They can never be equal c. They are always equal d. They add to 90°.