1 of 2
Field and potential near points and sheets (solution)
8.2.P5
In the figure at the right are shown four configurations of charge labelled A, B, C, and
D. The small circles are meant to represent point (i.e., very small) charges and the
long rectangl
1 of 4
Teaching Physics with the Physics Suite
Edward F. Redish
In this problem, you will use the
simulation "Charges and Fields"
from the University of Colorado's
PhET group. This program allows
you to explore the electric field
and electrostatic potenti
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The Faraday (solution)
8.1.P4
1. In chemistry, one often uses a unit of charge known as the Faraday, F, which has the magnitude of the charge of 1 mole of
electrons. How many Coulombs are there in a Faraday?
2. F is a very large charge. Consider tw
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Charge on a neuron (solution)
8.1.P2
A neuron is a body cell that functions to create and transmit electrical signals. To do this, it
uses chemical processes to maintain an electrical potential difference across its cell
membrane. In this problem w
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Removing a bulb (solution)
8.5.P16
The circuit at the right has four identical light bulbs connected to an ideal battery (i.e., its internal resistance can be ignored). The bulbs are in
sockets that are connected as shown with wires whose resistanc
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SHO variables (solution)
9.1.P19
A small cart with low friction wheels is attached to a
sturdy wall with a high quality spring that has negligible
internal damping. Use a coordinate system where the cart
is at equilibrium when the carts indicator p
Standing and traveling waves: Solution
In the figure at the right is shown
three graphs of the shapes of the
same taut elastic string in three
different circumstances, labelled
A, B, and C. In some of the
problems below, the string
represents a guitar str
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Nernst potential toy model (solution)
8.3.P9
Consider the inside and outside of a cell, where the 8 nanometer thick cell membrane has a large number of open Na+ Ion channels. The major
contributor to these ions is dissolved NaCl. Lets analyze a toy
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Diatomic vibrations (solution)
9.1.P5
The graph below shows data taken on the position of a small massive cart attached to a spring as
shown in the figure at the right.
A. Find the period (T), frequency (f), and angular frequency (0) of the oscilla
Problem Solution PE40
Teaching Physics with the Physics Suite
Edward F. Redish
The
bulldog on the skateboard
In the three figures
labeled A, B,
and C at the right are shown three
situations in which
a bulldog on a
skateboard traverses a dip in the
ground.
Name_
University of Maryland
Department of Physics
Physics 132
Spring 2014
D. Buehrle
27 February 2014
Exam 1
Instructions:
Do not open this examination until the proctor tells you to begin.
1. When the proctor tells you to begin, write your full name at
The resonance simulation: Solution
The PhET simulation team have a
simulation that shows a mass on a
spring being driven by an oscillating
base as shown in the figure at the
right. You can access this simulation
at
http:/phet.colorado.edu/en/simulation
/r
1 of 3
Teaching Physics with the Physics Suite
Edward F. Redish
a. A traditional problem in the mathematics of exponentials is the following:
"According to George Gamow, chess was invented by Sissa ben Dahir, Wazir of
the court of King Shiram. King Shiram
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Both ions moving
8.5.P3
We have discussed the motion of electrons in a conductor and the conditions under which Ohms law arises in a resistor. But there are other
situations in which potential differences lead to current flow. Consider a simple mod
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Thinking about an ammeter and a voltmeter (solution)
8.5.P14
An ammeter is an instrument that shows how much current passes through it. It is designed to have a small resistance. The following problems
show why.
A. Suppose an ammeter having a resis
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Capacitors in series and parallel (solution)
8.4.P5
A capacitor is a device for storing electrical energy in the form of a
separation of opposite charges. Since these opposite charges attract and
would naturally come together, there is energy avail
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Comparing the mass-on-spring and pendulum: 2 (solution)
9.1.P22
Below is shown the graph of the x position measured by a sonic ranger but the origin is shifted so that the 0 of the coordinate occurs at the
equilibrium point of the system.
A. Assume
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Comparing the mass-on-spring and pendulum: 2 (solution)
9.1.P22
Below is shown the graph of the x position measured by a sonic ranger but the origin is shifted so that the 0 of the coordinate occurs at the
equilibrium point of the system.
A. Assume
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The resistance of a pocket calculator (solution)
8.5.P9
A typical AA battery delivers a nearly constant voltage of 1.5 V and stores about 104 J of energy. From the time it takes you to use up the batteries
in your calculator estimate the resistance
Name_
University of Maryland
Department of Physics
Physics 132
Spring 2017
Prof. Dorland
April 20, 2017
Exam 2
Instructions:
Do not open this examination until the proctor tells you to begin.
1. When the proctor tells you to begin, write your full name at
Two equations with heat and temperature: Solution
We have learned two equations that relate the concepts of heat (transfer of thermal
energy), Q, and temperature (density of thermal energy), T. They are:
1. The equation for the heat capacity of an object:
University of Maryland
Department of Physics
Physics 132
Spring 2013
Exam 1 (Makeup) Solution
1. (25 points) 1.1 (5 pts) If you flip a fair coin 12 times, which string of
heads and tails are you more likely to get?
I: HHHHHHHHHHHH
II: HTHTTHTHHTTH
A.
B.
C
University of Maryland
Department of Physics
Physics 132
Spring 2016
Exam 2 (Sample Exam) Solution
Dr. B. Dreyfus
April. 2016
f) V0 = VA + VC
1. (25 points) In the circuit shown at the
Explanation: The correct answers are shown in boldface and follow
from
Charge on a neuron (solution)
8.1.P2
Aneuronisabodycellthatfunctionstocreateandtransmitelectricalsignals.Todothis,ituses
chemicalprocessestomaintainanelectricalpotentialdifferenceacrossitscellmembrane.Inthis
problemwewilluseourknowledgeofelectricalrelatio
Name_
University of Maryland
Department of Physics
Physics 132
Spring 2017
Prof. Dorland
April 20, 2017
Exam 2
Instructions:
Do not open this examination until the proctor tells you to begin.
1. When the proctor tells you to begin, write your full name at
1 of 1
Comparing capacitors 3 (solution)
8.4.P4B
In the figure below are shown four identical capacitors and two identical batteries connected in series and parallel. ranking the variables for the
four capacitors. Use > to mean greater than and = to mean
1 of 2
Modeling a nerve membrane (solution)
8.5.P4
As a result of a complex set of biochemical reactions, the cell membrane of a nerve cell pumps ions (Na+ and K+) back and
forth across itself, thereby maintaining an electrostatic potential difference fro
1 of 2
Molecular polymorphism (solution)
7.4.P7
The biological roles of complex organic molecules are determined by their shape - the way atoms and electrons create charge distributions on the
molecule's surface. As a result of those charge distributions,
University of Maryland
Department of Physics
Physics 131
Spring 2014
Exam 1
Drs. Peel & Upadhyaya
Sample Problems
1. (25 points) A worker is pushing a cart along the floor. At first, as the cart starts to move, the worker
has to push hard in order to get
University of Maryland
Department of Physics
Physics 131
Spring 2014
Exam 1
Drs. Peel & Upadhyaya
Sample Problems
1. (25 points) A worker is pushing a cart along the floor. At first, as the cart starts to move, the worker
has to push hard in order to get
University of Maryland
Department of Physics
Physics 131
Spring 2014
Exam 1
Drs. Peel & Upadhyaya
Sample Problems
1. (25 points) A worker is pushing a cart along the floor. At first, as the cart starts to move, the worker
has to push hard in order to get
Physics 131
Spring 2014
Drs. Peel &Upadhyaya
Final Exam (Samples)
1. A skateboarder is rolling along
a curved track as shown in the figure at the
right. At time t = 0 she starts with 0 velocity
at the position A. She rolls down the track,
over the hump, a