Consider an AC series circuit containing a coil, capacitor and resistance. Tripling the frequency will change the circuit's impedance by what factor?
a. 1/3
b. 1.0
c. 3
d. Information is insufficient to determine answer.
d
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Note the expression: y = A/x2 . Which statement is most consistent with this expression?
a. y is less than A b. if x is doubled, y is multiplied by a factor of four c. if x is halved, y is multiplied by a factor of four d. y is greater than x
Which of the following properties describes a low-mass star?
A) ends its life as a supernova B) late in life, fuses carbon into oxygen C) has longer lifetimes than high mass stars D) has higher main-sequence luminosities than high mass stars
You throw a Frisbee of mass m and radius r so that it is spinning about a horizontal axis perpendicular to the plane of the Frisbee. Ignoring air resistance, the torque exerted about its center of mass by gravity is
a. 0. b. mgr. c. 2mgr. d. a function of the angular velocity. e. small at first, then increasing as the Frisbee loses the torque given it by your hand.
Which expression is dimensionally consistent with an expression that would yield a value for time-1?(v is velocity, x is distance, and t is time)
a. v/x c. x/t b. v2/x d. v2t