Conceptual Physics / MasteringPhysics (Book & Access Card)
12th Edition
ISBN: 9780321908605
Author: Paul G. Hewitt
Publisher: PEARSON
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Chapter 17, Problem 98RCQ
To determine
The reason hot dogs pant.
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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).
1.) Two long parallel current-carrying wires P and Q are separated by 0.10 m. The current in wire P is 5.0 A.
The magnetic force on a length of 0.50 m of wire P due to the current in wire Q is 2.0 × 10-s N.
(a) State and explain the magnitude of the force on a length of 0.50 m of wire Q due to the current in P. [2]
(b) Calculate the current in wire Q. [2]
(c) Another current-carrying wire R is placed parallel to wires P and Q and halfway between them as shown.
wire P
wire R
wire Q
0.05 m
0.05 m
The net magnetic force on wire Q is now zero.
(c.i) State the direction of the current in R, relative to the current in P.[1]
(c.ii) Deduce the current in R. [2]
Chapter 17 Solutions
Conceptual Physics / MasteringPhysics (Book & Access Card)
Ch. 17 - Prob. 1RCQCh. 17 - Do the molecules in a liquid all have about the...Ch. 17 - What is evaporation?Ch. 17 - What is evaporation a cooling process?Ch. 17 - What is sublimation?Ch. 17 - Prob. 6RCQCh. 17 - Why is a steam burn more damaging than a burn from...Ch. 17 - Why do you feel uncomfortably warm on a hot and...Ch. 17 - Distinguish between humid and relative humidity.Ch. 17 - Why does water vapor in the air condense when the...
Ch. 17 - Why does warm, moist air from clouds when it...Ch. 17 - What is the basic difference between a cloud and...Ch. 17 - Distinguish between evaporation and boiling.Ch. 17 - Does increased atmospheric pressure increase or...Ch. 17 - Is it the boiling of water or the higher...Ch. 17 - Why doesn’t the water at the bottom of geyser boil...Ch. 17 - What happens to the water pressure at the bottom...Ch. 17 - Why doesn’t energy added to boiling water increase...Ch. 17 - When will water boil at a temperature lower...Ch. 17 - Prob. 20RCQCh. 17 - Why does increasing the temperature of a solid...Ch. 17 - Why does decreasing the temperature of a liquid...Ch. 17 - Why doesn’t water freeze at 00C when foreign ions...Ch. 17 - What happens to the hexagonal open structure of...Ch. 17 - Why doesn’t wire simply cut a block of ice in two...Ch. 17 - Does a liquid release energy or absorb energy when...Ch. 17 - Prob. 27RCQCh. 17 - Does the heat that is discharge at the...Ch. 17 - How many calories are needed to change the...Ch. 17 - Cite two reasons why firewalkers don’t burn their...Ch. 17 - Place a Pyrex funnel mouth-down in a saucepan full...Ch. 17 - Prob. 32RCQCh. 17 - Prob. 33RCQCh. 17 - Prob. 34RCQCh. 17 - Prob. 35RCQCh. 17 - Prob. 36RCQCh. 17 - The quantity of heat with temperature change is...Ch. 17 - Prob. 38RCQCh. 17 - Prob. 39RCQCh. 17 - Consider 50g of hot water at 800C poured into a...Ch. 17 - 50g chunk of 800C iron is dropped into a cavity in...Ch. 17 - Prob. 42RCQCh. 17 - Prob. 43RCQCh. 17 - 44. The heat of vaporization of ethyl alcohol is...Ch. 17 - Rank the boiling water temperatures from highest...Ch. 17 - From greatest to least, rank the energies needed...Ch. 17 - When you step out of a swimming pool on a hot, dry...Ch. 17 - Why is sweating an efficient mechanism for cooling...Ch. 17 - Why does blowing over hot soup cool the soup?Ch. 17 - What happens to the temperature of a pan of water...Ch. 17 - What is the source of energy that keeps the...Ch. 17 - An inventor claims to have developed a new perfume...Ch. 17 - Does a common electric fan cool the air in a room?...Ch. 17 - Prob. 54RCQCh. 17 - Prob. 55RCQCh. 17 - Prob. 56RCQCh. 17 - 57. Why are icebergs often surrounded by fog?
Ch. 17 - Prob. 58RCQCh. 17 - Prob. 59RCQCh. 17 - Prob. 60RCQCh. 17 - Prob. 61RCQCh. 17 - Prob. 62RCQCh. 17 - 63. A great amount of water vapor changes phase to...Ch. 17 - 64. Why does the temperature of boiling water...Ch. 17 - Prob. 65RCQCh. 17 - Prob. 66RCQCh. 17 - Prob. 67RCQCh. 17 - Prob. 68RCQCh. 17 - 69. Water will boil spontaneously in a vacuum—on...Ch. 17 - Prob. 70RCQCh. 17 - Prob. 71RCQCh. 17 - Prob. 72RCQCh. 17 - 73. If water that boils due to reduced pressure in...Ch. 17 - Prob. 74RCQCh. 17 - Prob. 75RCQCh. 17 - Prob. 76RCQCh. 17 - Prob. 77RCQCh. 17 - Prob. 78RCQCh. 17 - Prob. 79RCQCh. 17 - Prob. 80RCQCh. 17 - Prob. 81RCQCh. 17 - Prob. 82RCQCh. 17 - Prob. 83RCQCh. 17 - Prob. 84RCQCh. 17 - Prob. 85RCQCh. 17 - Prob. 86RCQCh. 17 - Prob. 87RCQCh. 17 - Prob. 88RCQCh. 17 - Prob. 89RCQCh. 17 - Prob. 90RCQCh. 17 - 91.Why is half-frozen fruit punch always sweeter...Ch. 17 - Prob. 92RCQCh. 17 - Prob. 93RCQCh. 17 - Prob. 94RCQCh. 17 - Prob. 95RCQCh. 17 - Prob. 96RCQCh. 17 - Prob. 97RCQCh. 17 - Prob. 98RCQCh. 17 - Prob. 99RCQCh. 17 - Prob. 100RCQCh. 17 - Prob. 101RCQCh. 17 - Prob. 102RCQCh. 17 - Prob. 103RCQCh. 17 - Prob. 104RCQCh. 17 - 105. When can you add heat to something without...Ch. 17 - Prob. 106RCQCh. 17 - 107. When can you withdraw heat from something...Ch. 17 - Discuss why water can issue from deep underwater...Ch. 17 - Prob. 109RCQCh. 17 - Prob. 110RCQ
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