Exhibit 18-1The figure below shows wave crests after a stone is thrown into a pond.
Use this exhibit to answer the following question(s).
Refer to Exhibit 18-1. The phase difference in radians between points A and B is
A.
B.
.C.
.D.
E.
.Answer: A
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Magnetic field lines about a current-carrying wire
A) extend radially from the wire. B) circle the wire in closed loops. C) both of these D) neither of these
Four identical particles (mass of each = 0.40 kg) are placed at the vertices of a rectangle (2.0 m × 3.0 m) and held in those positions by four light rods which form the sides of the rectangle. What is the rotational inertia of this rigid body about an axis that passes through the mid-points of the longer sides and is parallel to the shorter sides?
a. 2.7 kg/m2 b. 3.6 kg/m2 c. 3.1 kg/m2 d. 4.1 kg/m2 e. 1.6 kg/m2
A cola drink is a good example of
a. a compound. b. a heterogeneous mixture. c. a homogeneous mixture. d. an element.
A permanent magnet is produced when
A. electrical fields exchange electrons with the magnetic fields. B. electrons become stuck and cease to move. C. current is made to circulate in a clockwise direction in a loop of wire. D. magnetic fields of large groups of individual atoms are permanently aligned.