The graphs below represent current and voltage phasors at one instant of time. The solid arrows represent the voltage phasors, ?V, and the dashed arrows represent the current phasors, Imax.Which graph shows the correct relationship between current and voltage phasors for an inductor in an RL circuit?
a.
b.
c.
a
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A bucket of water with total mass 21.0 kg is attached to a rope, which in turn is wound around a 0.050-m radius cylinder, with crank, at the top of a well. The moment of inertia of the cylinder and crank is 0.21 kg m2 . The bucket is raised to the top of the well and released to fall back into the well. What is the kinetic energy of the cylinder and crank at the instant the bucket is moving with
a speed of 5.4 m/s? a. 4.8E+2 J b. 1.2E+3 J c. 3.1E+2 J d. 1.2E+4 J
A steel pipe column (E 5 190 GPa, ? 5 14 3 1026/°C, d2 5 82 mm, and d1 = 70 mm) of length L 5 4.25 m is subjected to a temperature increase DT. The column is pinned at the top and fixed at the bottom. The tem- perature increase at which the column will buckle is approximately:
(A) 36 8C
(B) 42 8C
(C) 54 8C
(D) 58 8C
One U.S. fluid gallon contains a volume of 231 cubic inches. How many liters of gasoline would you have to buy in Canada to fill a 14-gallon tank? (Note: 1L = 10+3 cm3.)
a. 53 b. 21 c. 14 d. 8.0 e. 4.0
When a baseball pitcher throws a curve ball, he makes the ball spin about an axis ________ the direction in which the ball's center of mass is moving
A) parallel to B) perpendicular to C) 45° with respect to