A body oscillates with simple harmonic motion along the x axis. Its displacement varies with time according to the equation x = 5 sin (?t + ?/3). The phase (in rad) of the motion at t = 2 s is
a. 7?/3
b. ?/3
c. ?
d. 5?/3
e. 2?
a
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__________is a unit of distance equal to the distance light travels in 1 year
A) The astronomical year B) The light-year C) A light parsec D) A light meter
RC Circuits: When an initially uncharged capacitor is charged through a 25-k? resistor by a 75-V dc ideal power source, it takes 0.23 ms for the capacitor to reach 50% of its maximum charge? What is the capacitance of this capacitor?
Fill in the blank(s) with the appropriate word(s).
A bar magnet that holds a chain of nails illustrates
A) magnetic field displacement. B) magnetic induction. C) electromagnetic induction.
Four identical 4-mF capacitors are connected together electrically. What is the least possible capacitance of the combination?
a. 4 mF c. 1/8 mF b. 1 mF d. 1/4 mF