Inquiry into Physics
8th Edition
ISBN: 9781337515863
Author: Ostdiek
Publisher: Cengage
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Chapter 5, Problem 39Q
To determine
The concept of entropy and how does it change with time.
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4.) The diagram shows the electric field lines of a positively charged conducting sphere of
radius R and charge Q.
A
B
Points A and B are located on the same field line.
A proton is placed at A and released from rest. The magnitude of the work done by the electric field in
moving the proton from A to B is 1.7×10-16 J. Point A is at a distance of 5.0×10-2m from the centre of
the sphere. Point B is at a distance of 1.0×10-1 m from the centre of the sphere.
(a) Explain why the electric potential decreases from A to B. [2]
(b) Draw, on the axes, the variation of electric potential V with distance r from the centre of the
sphere.
R
[2]
(c(i)) Calculate the electric potential difference between points A and B. [1]
(c(ii)) Determine the charge Q of the sphere. [2]
(d) The concept of potential is also used in the context of gravitational fields. Suggest why scientists
developed a common terminology to describe different types of fields. [1]
3.) The graph shows how current I varies with potential difference V across a component X.
904
80-
70-
60-
50-
I/MA
40-
30-
20-
10-
0+
0
0.5
1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
VIV
Component X and a cell of negligible internal resistance are placed in a circuit.
A variable resistor R is connected in series with component X. The ammeter reads 20mA.
4.0V
4.0V
Component X and the cell are now placed in a potential divider circuit.
(a) Outline why component X is considered non-ohmic. [1]
(b(i)) Determine the resistance of the variable resistor. [3]
(b(ii)) Calculate the power dissipated in the circuit. [1]
(c(i)) State the range of current that the ammeter can measure as the slider S of the potential divider
is moved from Q to P. [1]
(c(ii)) Describe, by reference to your answer for (c)(i), the advantage of the potential divider
arrangement over the arrangement in (b).
Chapter 5 Solutions
Inquiry into Physics
Ch. 5 - Explain why the Moon and Mercury possess only very...Ch. 5 - The dwarf planet Pluto has an average surface...Ch. 5 - Prob. 1AACh. 5 - Prob. 2AACh. 5 - Discuss some of the early developments in the...Ch. 5 - Prob. 2PIPCh. 5 - In Section 5.2, we discussed the phenomenon of...Ch. 5 - Prob. 2MIOCh. 5 - (¦ Indicates a review question, which means it...Ch. 5 - Prob. 2Q
Ch. 5 - Prob. 3QCh. 5 - (¦ Indicates a review question, which means it...Ch. 5 - Indicates a review question, which means it...Ch. 5 - (¦ Indicates a review question, which means it...Ch. 5 - Prob. 7QCh. 5 - (¦ Indicates a review question, which means it...Ch. 5 - Prob. 9QCh. 5 - Prob. 10QCh. 5 - (¦ Indicates a review question, which means it...Ch. 5 - (¦ Indicates a review question, which means it...Ch. 5 - (¦ Indicates a review question, which means it...Ch. 5 - Prob. 14QCh. 5 - (¦ Indicates a review question, which means it...Ch. 5 - (¦ Indicates a review question, which means it...Ch. 5 - (¦ Indicates a review question, which means it...Ch. 5 - Prob. 18QCh. 5 - (¦ Indicates a review question, which means it...Ch. 5 - (¦ Indicates a review question, which means it...Ch. 5 - Prob. 21QCh. 5 - Prob. 22QCh. 5 - Prob. 23QCh. 5 - Prob. 24QCh. 5 - Prob. 25QCh. 5 - Prob. 26QCh. 5 - Prob. 27QCh. 5 - Prob. 28QCh. 5 - (¦ Indicates a review question, which means it...Ch. 5 - (¦ Indicates a review question, which means it...Ch. 5 - Prob. 31QCh. 5 - Prob. 32QCh. 5 - Prob. 33QCh. 5 - Prob. 34QCh. 5 - Prob. 35QCh. 5 - Prob. 36QCh. 5 - Prob. 37QCh. 5 - Prob. 38QCh. 5 - Prob. 39QCh. 5 - (¦ Indicates a review question, which means it...Ch. 5 - Prob. 41QCh. 5 - Prob. 42QCh. 5 - Prob. 43QCh. 5 - Prob. 44QCh. 5 - Prob. 45QCh. 5 - Prob. 46QCh. 5 - Prob. 1PCh. 5 - On a nice winter day at the South Pole, the...Ch. 5 - An iron railroad rail is 700 ft long when the...Ch. 5 - A copper vat is 10 m long at room temperature...Ch. 5 - A machinist wishes to insert a steel rod with a...Ch. 5 - An aluminum wing on a passenger is 30 m long when...Ch. 5 - A fixed amount of a particular ideal gas at 16C°...Ch. 5 - em>. The volume of an ideal gas enclosed in a...Ch. 5 - A gas is compressed inside a cylinder (Figure...Ch. 5 - Prob. 10PCh. 5 - . How much heat is needed to raise the temperature...Ch. 5 - Prob. 12PCh. 5 - - (a) Compute the amount of heat needed to raise...Ch. 5 - Prob. 14PCh. 5 - . A 1,200-kg car going 25 m/s is brought to a stop...Ch. 5 - Prob. 16PCh. 5 - Prob. 17PCh. 5 - Prob. 18PCh. 5 - . On a winter day, the air temperature is — 15°C,...Ch. 5 - . On a summer day in Houston, the temperature is...Ch. 5 - . Inside a building, the temperature is 20°C, and...Ch. 5 - . On a hot summer day in Washington, D.C., the...Ch. 5 - . An apartment has the dimensions 10 in 1w 5 in 3...Ch. 5 - Prob. 24PCh. 5 - . The temperature of the air in thermals decreases...Ch. 5 - In cold weather, you can sometimes "see" your...Ch. 5 - . What is the Carnot efficiency of a heat engine...Ch. 5 - . What is the maximum efficiency that a hear...Ch. 5 - . As a gasoline engine is miming, an amount of...Ch. 5 - . A proposed ocean thermal-energy conversion...Ch. 5 - . An irreversible process takes place by which the...Ch. 5 - . The temperature in the deep interiors of some...Ch. 5 - Prob. 1CCh. 5 - Pyrex g1assware is noted for its ability to...Ch. 5 - Prob. 3CCh. 5 - As air rises in the atmosphere, its temperature...Ch. 5 - . 5. If air at 35°C and 77 percent relative...Ch. 5 - Prob. 6C
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