Problem 3 (16 Marks)
A) Equilibrium price:
Quantity demanded = Quantity supplied
10 P = P 4
10 + 4 = 2P
14 = 2P
14/2 = 2P/2
P* = $7.00 The equilibrium price for widgets is $7.00 dollars per unit.
Plug P* into Quantity demanded or Quantity supplied to find
Physics 104 Problems - Solution
275.
(HRW 23.62) An electric dipole with dipole moment
p = (3.00 i + 4.00 j)(1.24 10-30 C.m)
is in an electric field E = (4000 N/C)i.
a) What is the potential energy of the electric dipole?
b) What is the torque acting on i
Physics 104/6 Problems - Solution
99.
A highway curve of radius R is banked at an angle . The coefficient of static
friction between the road surface and the tires of a sports car is S.
a) At what constant speed should the sports car round the curve for m
Hand In
, . . P . 1 of 11
Queen s Umversrty 9
Faculty of Arts and Science
Department of Physics, Engineering Physics & Astronomy
Phys 104l106
Winter Midterm Examination
28 Feb 2014
Instructor. Prof. J.M. Fraser
Examination duration: 80 minutes (individual
Physics 104/6 Problems - Solution
413.
Assuming that the wave on a string is represented by
2
y(x, t) = y 0 sin (vt x)
where y is the transverse displacement at time t (sec) of the piece of string at x (m)
and the other symbols have their usual meaning,
CalcPhys 104/6 Problem Set #13-virtual.
You do not need to hand this problem set in for marking. Solutions are posted so
you can check if you mastered the content.
Q1) A uniform beam of length L and mass M is freely pivoted at one end about an
attachment
Physics 104/6 Problems - Solution
273.
The arrangement ABCD has point charges 6.0 nC, 0.40 nC, + 0.40 nC at A, C
and D respectively, and the dimensions are in metres.
a) What are the direction and magnitude of the
electric field at B?
b) What is the value
Physics 104/6 Problems - Solution
141.
A 1500 kg car accelerates uniformly to 100 km/h in 10 s. The frictional forces
acting on the car due to tire resistance, air resistance, etc. can be represented to a
good approximation by the expression f = a + bv2 w
CalcPhys 104/6 Problem Set #7.
Make sure to staple your solution pages together. Put your name and group (including alpha, beta,
gamma, delta) as well as your collaborators on the first page!
Considering the feedback you provided on the reading assignment
Solution set 23
27-54. The particles in the mass spectrometer follow a semicircular path as shown in Fig. 27-33. A
particle has a displacement of 2r from the point of entering the semicircular region to where it strikes
the film. So if the separation of t
Physics 104/6 Problems Solutions
9-64P. By the symmetry of the problem, since the centers of the cubes are along a straight line,
the vertical CM coordinate will be 0, and the depth CM coordinate will be 0. The only CM
coordinate to calculate is the one a
14.
Eq. 14-4 is x Acos t .
(a)
If x 0 A , then A A cos cos 1 1 .
(b)
If x 0 0 , then 0 A cos cos 1 0 12 .
(c)
If x 0 A , then A A cos cos 1 1 0 .
(d)
If x 0 12 A , then
(e)
If x 0 12 A , then 12 A A cos cos1 12 23 .
(f)
If x 0 A
1
2
A A cos cos 1 12
2 ,
Physics 104 Problems - Solution
323.
(HRW 28.44) You are given two batteries of emf and internal resistance r.
They may be connected either in parallel, see diagram i), or in series, diagram ii)
and are used to establish a current in a resistor R.
i)
ii)
[If you are not comfortable with determining the determinant of a 3by3 matrix, you can just use
=
= (this relationship defines our standard XYZ coordinate system)
=
=
10. We apply Eq. 27-3 to each circumstance, and solve for the magnetic field. Let B
Livent:
Livent was a Live theatre production company founded in 1989 in Toronto, Ontario by two gentlemen
Garth Dabrinsky and Myron Gottlieb
Livent was most famous for productions like Show boat, Kiss of the spider woman, ragtime and most
importantly Phan
wiSl 10 Page l ot23
i .
question paper
WWW-m-WW Turn in exam
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QUEEN'S UNIVERSITY AT KINGSTON
FACULTY OF ARTS AND SCIENCE
Department of Economics
ECONOMICS 110
Final Examination
April 13, 2015
Course Sections and Instructors:
Econ 110 Se
Market Failures and Government Intervention Chapter 16
Informal Defence of Free Markets
1. Provides automatic coordination from the actions of decentralized decision
makers
a. Flexible and can quickly adjust to change (such as a price change)
b. Provides
12/01/12
Chapter 17 Readings Environment
*Policies designed to protect the environment do not always do so in an efficient manner*
The profit maximizing firm neglects these external effects of its actions because its
profits are not directly affected by t
Chapter 18 Readings (Taxes)
Taxes account for nearly 40% of GDP
Progressive Tax
A tax that takes a larger percentage of incomer at higher levels of income
Requires an average tax rate that rises with income
Proportional Tax
A tax that takes a constant per
Chapter 19 Readings
Macroeconomics; is concerned with the behavior of economic aggregates and averages, such as total
output, total investment, total exports, and the price level, and with how they may be influenced by
government policy.
Focuses on the ec
Chapter 20 readings
National Output and Value Added
(Production occurs in stages; Some firms produce outputs that are used as inputs by other firms,
and these other firms, in turn, produce outputs that are used as inputs by yet other firms)
Double Countin
19. The angular momentum of the personturntable system will be conserved. Call the direction of the
persons motion the positive rotation direction. Relative to the ground, the persons speed will be
v vT , where v is the persons speed relative to the turnt
Physics 104/6 Problems - Solution
137.
(HRW 8.38) A 20 kg object is acted on by a conservative force given by
F 3.0 x 5.0 x 2 , with F in newtons and x in metres. Take the potential energy
associated with the force to be zero when the object is at x = 0.
Physics 104/6 Problems - Solution
175. a) Prove that the moment of inertia of a thin rod of length l about an axis through its
centre perpendicular to its length is I = 121 M l 2 .
b) Use the parallel-axis theorem to show that I = 13 Ml 2 when the axis of
30.
(a)
Divide the cylinder up into concentric cylindrical shells of
radius r, thickness dr, and length l. See the diagram. The
resistance of one of those shells, from Eq. 25-3, is found. Note
that the length in Eq. 25-3 is in the direction of the current
Physics 104/6 Problems - Solution
250.
Consider the square charge distribution shown with
q = 1.0 10-8 C and a = 1 m.
q
2q
a
a) What is the force on the charge q due to the other
three charges?
b) What is the electric field at the centre of the square?
a