The typical size of an interstellar dust grain is
A) 1 angstrom.
B) 1 nanometer.
C) 1 micrometer.
D) 1 millimeter.
E) 1 centimeter.
C
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Resistor A has twice the resistance of resistor B. When individually connected across a given potential difference, which one dissipates the most power; and when connected in series across the same potential difference, which one dissipates the most power?
a. A, A c. A, B b. B, B d. B, A
During totality of a lunar eclipse the Moon disappears from view on the night sky.
Answer the following statement true (T) or false (F)
Which of these singly ionized atoms of the same speed will curve most in a magnetic field?
A) helium B) iron C) uranium D) all the same
In a capacitor in an AC circuit, the voltage:
a. leads the current by 90°. b. lags the current by 90°. c. may lead or lag the current depending on the frequency. d. is in phase with 70.7% of the current.