Electric Charge Homework
c.9) An empty boat is placed in a freshwater lake and a mark is painted on the hull at the
waterline, a line corresponding to the surface of the water when the vessel is floating upright.
The boat is then transported to
Thermal Energy Homework
c.3) A steel block is heated so that the length of each side increases 1%. What happens to its
It increases 1%
It increases 3%
It increases 3.0301%
It does not change
3.1 a/b) Convert each of the fo
Convex Mirrors & Mirror Equation Homework
c.4) An object is placed in front of a convex mirror. Draw a ray diagram to determine the nature
of the image. Check all the boxes that describe the image.
Internal Reflection Homework
c.7) You hold up your index finger very close to the surface of a concave mirror (inside the focal
point). (a) As you move your finger farther from the mirror, does the image of your finger get
larger or smaller? (b
Internal Reflection Homework
c.5) Why does a tiled floor feel colder to your bare feet than a carpeted floor, even though they
are both at room temperature?
3.1c) Convert each of the following temperatures to the indicated scale: (c) 72F to the
Snell's Law Homework
c.6) If you want to create a real image, which object location and mirror combinations could you
use? Check all that apply.
Object in front of convex mirror
Object at distance over twice the focal length from concave mirr
Superposition & Harmonics Homework
c.1) Many children are lined up at an ice cream stand. If the child at the back pushes the child in
front of him, and she in turn pushes the child in front of her, and so on, will they create a
transverse or l
6.2) If 12 wave crests pass you in 26 seconds as you bob in the ocean, what is the frequency of
7.4) The radio wave from a station broadcasting at 1.3106 Hz has a wavelength of 230 m. What
is the wave's speed?
c.2) When sports spectators do "the wave," are they making a transverse or longitudinal wave?
c.4) A wave is traveling through a particular medium. The wave source is then modified so that it
Plane Mirrors Homework
0.1) Use the simulation in the interactive problem in this section to answer the following
questions. (a) Where can you place the object so that the image and object are on the same side
of the mirror? (b) Where can you p
Magnetic Fields Homework
6.2) A ball with mass 0.48 kg moves at a constant speed. A centripetal force of 23 N acts on the
ball, causing it to move in a circle with radius 1.7 m. What is the speed of the ball?
6.3) A bee loaded with pollen flies
Fluid Pressure Homework
2.2a/b) The density of air at standard atmospheric pressure and 15C is 1.23 kg/m3. (a) What is
the total mass of the air in a rectangular room that measures 5.25 m 4.20 m 2.15 m? (b) What
is the weight of the air in the
Electric Potential Energy 1 Homework
c.5) In the diagram, two protons and one electron are placed on a line. Describe the part(s) of the
line, relative to the positions of the particles, where the strength of the electric field due to the
Equivalent Resistance Homework
c.2) 3 amperes of current flow through a wire. (a) What net charge flows past a point in the wire
each second? (b) What is the net charge on the wire?
1.6) A wire etched onto a computer chip carries a current of 4
Magnetic Forces on Wires Homework
c.13) A charged particle is moving freely through a uniform field. How can you tell if the field is
an electric field or a magnetic field?
c.15) A current-carrying wire is placed in a uniform magnetic field, bu
Magnetic Forces on Charges Homework
7.3) An electron (q = 1.601019 C) is traveling through the Earth's magnetic field at a location
on the Earth's surface where the field has a strength of exactly 5.00105 T, directed due north.
At a particular
Magnetic Forces Near Wires Homework
c.8) In each part of this problem, you know a charged particle is moving at a constant velocity,
and you are asked to draw conclusions about the electric and magnetic fields around the particle.
Current, Resistance, Ohm's Law Homework
1.3) A mouse sits next to a cell phone charger cord for 4.10 seconds, debating whether it is
something worth chewing on. If the cord carries a current of 3.00 amperes, what is the magnitude
of the charge
Electric Potential Energy 2 Homework
c.8) Two wires are made from materials, such as copper and aluminum, that have different
resistivities. The wires have the same length. Is it possible for them to have the same resistance?
First Law of Thermo I Homework
3.3) An iron rod is heated from 66.0F to 280F. Express the increase in temperature in Celsius.
9.4) The aptly-named Steel Bridge over the Willamette River in Portland, Oregon, has a central
span steel truss that i
First Law of Thermo 2 Homework
9.5) A ring of silver has an inside diameter of 2.355 cm at a temperature of
23.48C. A steel rod has a diameter of 2.361 cm. To what temperature should you raise the ring
so it will just slip onto the rod? Assume
Electric Field Homework
c.11) Consider an isolated system of three stationary nonzero charges. No other forces are
present. (a) Is it possible that any of the charges is experiencing zero net force? (b) If your
answer to part "a" is yes, give a
Plane Mirrors Homework
c.2) An object is placed between the focal point and center of curvature of a concave mirror.
Draw a ray diagram to determine the nature of the image. Check all the boxes that describe the