The
Millbrook Network
Commons
Community
Project
WCT
CHRISTINA KOFIT
"Making
a Community
GREG SHEHAN
Connection"
We Connect Technologies
SCOTT HOGG
DONNA ELLIOTT
AMANDA DEWEES
Table of Contents
I.
Executive
Summary.2
II.
Review of Recent trends in 65+ Age
Rotational Motion
_
1. 2 600 rev/min is equivalent to which of the following?
a. 2600 rad/s
c. 273 rad/s
b. 43.3 rad/s
d. 60 rad/s
_
2. A grindstone spinning at the rate of 8.3 rev/s has what approximate angular speed?
a. 3.2 rad/s
c. 52 rad/s
b. 26 rad/s
Reflection and Refraction
_
1. A ray of light strikes a thick sheet of glass ( n = 1.5) at an angle of 25 with the normal. Find the angle of the
ray reflected off the glass surface with respect to the normal.
a. 56
c. 39
b. 46
d. 25
_
2. As the angle of i
PRACTICE MULTIPLE CHOICE QUESTIONS
ANSWERS AT END
Multiple Choice Questions -1-
ELECTRIC FORCES A D THE ELECTRIC FIELD
_1.
Doug rubs a piece of fur on a hard rubber rod, giving the rod a negative charge. What happens?
A. Protons are removed from the rod.
Sound
_
1. A sound wave coming from a tuba has a wavelength of 1.50 m and travels to your ears at a speed of 345 m/s.
What is the frequency of the sound you hear?
a. 517 Hz
c. 230 Hz
b. 1/517 Hz
d. 1/230 Hz
_
2. A series of ocean waves, 5.0 m between cres
Lenses and Mirrors
_
1. You stand two feet away from a plane mirror. How far is it from you to your image?
a. 2.0 ft
c. 4.0 ft
b. 3.0 ft
d. 5.0 ft
_
2. Which of the following best describes the image from a plane mirror?
a. virtual and magnification great
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Chapter 27
Domains
Magnetic moment
RH rule
No monopoles
domains gives rise to
permanent magnetic field
1
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Forces on Moving Charges
Magnetic Field strength B
Analogous to E
Electric forces do not require the
charges to move, but mag
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Chapter 28
Moving Charges
If moving charges are affected by
magnetic fields, it must be because they
produce their own magnetic fields
4
X
o = permeability of free
space: 4E-7 Ns2/C2
Biot-Savart (rhymes with Leo and bazaar)
4
X
4
X
1
Vectors
1. A student adds two vectors with magnitudes of 200 and 40. Which one of the following is the only possible choice
for the magnitude of the resultant?
a. 100
c. 260
b. 200
d. 40
2. The first displacement is 6 m and the second displacement is 3 m.
Wave Optics
_
1. Two beams of coherent light are shining on the same piece of white paper. With respect to the crests and
troughs of such waves, darkness will occur on the paper where:
a. the crest from one wave overlaps with the c. the troughs from both
Solids and Fluids
_
1. A solid object is made of two materials, one material having density of 2 000 kg/m 3 and the other having
density of 6 000 kg/m 3. If the object contains equal volumes of the materials, what is its average density?
a. 3 000 kg/m3
c.
Thermodynamics I
_
1. What is the temperature of a system in thermal equilibrium with another system made up of water and steam
at one atmosphere of pressure?
a. 0F
b. 273 K
c. 0 K
d. 100C
_
2. What is the temperature of a system in thermal equilibrium wi
Newton's Laws
_
1. A 7.0-kg bowling ball experiences a net force of 5.0 N. What will be its acceleration?
a. 35 m/s2
c. 5.0 m/s2
2
b. 7.0 m/s
d. 0.71 m/s2
_
2. An astronaut applies a force of 500 N to an asteroid, and it accelerates at 7.00 m/s 2. What is
Vibrations and Waves
_
1. A large spring requires a force of 150 N to compress it only 0.010 m. What is the spring constant of the
spring?
a. 125 000 N/m
c. 15 N/m
b. 15 000 N/m
d. 1.5 N/m
_
2. Tripling the weight suspended vertically from a coil spring w
Selected Topics from Modern Physics
_
1. According to the special theory of relativity, if a 30-year old astronaut sent on a space mission is accelerated
to speeds close to that of light, and then returns to earth after 20 years as measured on earth, what
Optical Instruments
_
1. A converging lens will be prescribed by the eye doctor to correct which of the following?
a. farsightedness
c. nearsightedness
b. glaucoma
d. astigmatism
_
2. A diverging lens will be prescribed by the eye doctor to correct which
Torque and Angular Momentum
_
1. A vault is opened by applying a force of 300 N perpendicular to the plane of the door, 0.80 m from the
hinges. Find the torque due to this force about an axis through the hinges.
a. 120 Nm
c. 300 Nm
b. 240 Nm
d. 360 Nm
_
2
Thermodynamcs II
_
1. Of the following systems, which contains the most heat?
a. 100 kg of water at 80C
c. 600 kg of ice at 0C
b. 250 kg of water at 40C
d. Systems do not contain heat.
_
2. Carly places one end of a steel bar in a Bunsen flame and the oth
2/10/2013
Chapter 32
Maxwells Equations
One of Einsteins
heroes
First Unified Theory
With Lorentz force
explains all of
classical E&M
=
=0
=
=-
+
X
EM Spectrum
1
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Plane waves
Let ic = 0 for free space:
1
dl for B is only a, as done
earlier
2/10/2013
Chapter 29
Michael Faraday
Consider:
B arises from I
I is defined by Q moving with v
Q moving with v undergoes F in B
There must be a connection!
Magnetic Flux
Three options for dB:
dB
dA
d
1
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But first: Lenzs Law
The minus si
2/10/2013
Chapter 30
Inductance: mutual
Capacitors have capacitance, resistors have
resistance, and inductors have
B2 depends on i1.
B1 <> B2
So:
i
Symmetry: M12 = M21
Unit: 1 Henry = 1Wb/A
Transformers
Find M, Induced EMF
A1 = A2 = 10cm2
L = 0.50m
N1= 1
2/10/2013
Chapters 21 & 22
The Standard Model
Charge
What is charge?
What possesses charge?
L, M, T, and now Q
quarks and e qu = +2/3, qd = -1/3, e- = -1
2 qu + 1 qd = P+; 1 qu + 2 qd = N
First concepts
Thales
Franklin
Volta
1
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Accumulated
2/10/2013
Chapter 26
Two Fundamental Forms
Series: one component succeeds
another
Parallel: all components share
the same connection
Terms:
The current through each is the
same
Each component receives the same
voltage
Loop
Junction
Branch
Open
Short
Res
2/10/2013
Chapter 23
The Potential for Analogy
Gravity and Electrostatics have much in
common:
Both give rise to fields
Newtons Law of Gravitation and Coloumbs
Law of Electrostatic Attraction follow the
same form
Gauss Law can be applied to both
Energy
Gravity
_
1. At what location does an artificial Earth satellite in elliptical orbit have its greatest speed?
a. nearest the Earth
c. between Earth and Moon
b. farthest from the Earth
d. between Earth and Sun
_
2. Which of the following best describes the
Energy
_
1. Rupel pushes a box 5.00 m by applying a 25.0-N horizontal force. What work does she do?
a. 10.0 J
c. 125 J
b. 25.0 J
d. 550 J
_
2. A horizontal force of 100 N is applied to move a 45-kg cart across a 9.0-m level surface. What work is done
by t
2/10/2013
Chapter 25
Current
Given sufficient potential
difference, electrons will flow
E points in the direction of
decreasing potential, so the
force on an electron is in the
opposite direction
Current I is defined as dQ/dt
1 Ampere = 1C/sec
Andre Am
Electric Fields
_
1. Two point charges are 4 cm apart. They are moved to a new separation of 2 cm. By what factor does the
resulting mutual force between them change?
a. 1/2
c. 1/4
b. 2
d. 4
_
2. If the distance between two point charges is tripled, the m
DC Circuits
_
1. The two ends of a 3.0- resistor are connected to a 9.0-V battery. What is the current through the resistor?
a. 27 A
c. 3.0 A
b. 6.3 A
d. 0.33 A
_
2. The two ends of a 3.0- resistor are connected to a 9.0-V battery. What is the total power