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Physics 107 TUTORIAL ASSIGNMENT #10
Cutnell & Johnson, 7th edition
Chapter 22:
Chapter 24:
Chapter 25:
Chapter 26:
Problem 5
Problem Q3
Problems 13, 15
Problems 21, 24, 99, 105
Chapter 22
5 ssm The drawing shows three identical rods (A, B, and C)
moving in different planes. A constant magnetic field of magnitude
0.45 T is directed along the +y axis. The length of each rod is
L = 1.3 m, and the speeds are the same, vA = vB = vC = 2.7 m/s. For
each rod, find the magnitude of the motional emf, and indicate
which end (1 or 2) of the rod is positive.
Chapter 24
3 ssm A transmitting antenna is located at the origin of an x, y, z axis system and broadcasts an
electromagnetic wave whose electric field oscillates along the y axis. The wave travels along the
axis. Three possible wire loops are available for use with an LC-tuned circuit to detect this
wave: One loop lies in the xy plane, another in the xz plane, and the third in the yz plane. Which
of the loops will detect the wave? Why?
Chapter 25
13 ssm The radius of curvature of a convex mirror is
. An object that is 10.0 cm
high is placed 25.0 cm in front of this mirror. Using a ray diagram drawn to scale, measure (a)
the location and (b) the height of the image. The mirror must be drawn to scale.
*15 A plane mirror and a concave mirror (
) are facing each other and are separated
by a distance of 20.0 cm. An object is placed 10.0 cm in front of the plane mirror. Consider the
light from the object that reflects first from the plane mirror and then from the concave mirror.
Using a ray diagram drawn to scale, find the location of the image that this light produces in the
concave mirror. Specify this distance relative to the concave mirror.
Chapter 26
*21 ssm A small logo is embedded in a thick block of crown glass (n = 1.52), 3.20 cm beneath
the top surface of the glass. The block is put under water, so there is 1.50 cm of water above the
top surface of the block. The logo is viewed from directly above by an observer in air. How far
beneath the top surface of the water does the logo appear to be?
24 A point source of light is submerged 2.2 m below the surface of a lake and emits rays in all
directions. On the surface of the lake, directly above the source, the area illuminated is a circle.
What is the maximum radius that this circle could have?
99 ssm The drawing shows a crown glass slab with a rectangular
cross section. As illustrated, a laser beam strikes the upper surface at
an angle of 60.0°. After reflecting from the upper surface, the beam
reflects from the side and bottom surfaces. (a) If the glass is
surrounded by air, determine where part of the beam first exits the
glass, at point A, B, or C. (b) Repeat part (a), assuming that the glass
is surrounded by water.
105 ssm The drawing shows a coin resting on the bottom of a beaker
filled with an unknown liquid. A ray of light from the coin travels to the
surface of the liquid and is refracted as it enters into the air. A person
sees the ray as it skims just above the surface of the liquid. How fast is
the light traveling in the liquid?