Physics (5th Edition)
5th Edition
ISBN: 9780134051802
Author: Walker
Publisher: PEARSON
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Textbook Question
Chapter 17.5, Problem 5EYU
Which requires more heat: melting 100 kg of copper or boiling 10 kg of water?
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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
Physics (5th Edition)
Ch. 17.1 - Rank the following ideal-gas systems in order of...Ch. 17.2 - If the Kelvin temperature of a gas is doubled, by...Ch. 17.3 - A metal rod of a given initial length and...Ch. 17.4 - A portion of a substances phase diagram is shown...Ch. 17.5 - Which requires more heat: melting 100 kg of copper...Ch. 17.6 - An ice cube is placed in a cup of water. A few...Ch. 17 - How is the air pressure in a tightly sealed house...Ch. 17 - The average speed of air molecules in your room is...Ch. 17 - Is it possible to change both the pressure and the...Ch. 17 - Prob. 4CQ
Ch. 17 - A camping stove just barely boils water on a...Ch. 17 - An autoclave is a device used to sterilize medical...Ch. 17 - As the temperature of ice is increased, it changes...Ch. 17 - BIO Isopropyl alcohol is sometimes rubbed onto a...Ch. 17 - A drop of water on a kitchen counter evaporates in...Ch. 17 - (a) Is the number of molecules in one mole of N2...Ch. 17 - Predict/Explain If you put a helium-filled balloon...Ch. 17 - Two containers hold ideal gases at the same...Ch. 17 - Prob. 4PCECh. 17 - BIO After emptying her lungs, a person inhales 4.3...Ch. 17 - An automobile tire has a volume of 0.0185 m3. At a...Ch. 17 - Prob. 7PCECh. 17 - A compressed-air tank holds 0.500 m3 of air at a...Ch. 17 - Four ideal gases have the following pressures, P,...Ch. 17 - A balloon contains 3.9 liters of nitrogen gas at a...Ch. 17 - Prob. 11PCECh. 17 - Predict/Calculate A bicycle tire with a volume of...Ch. 17 - A 515-cm3 flask contains 0.460 g of a gas at a...Ch. 17 - Prob. 14PCECh. 17 - The air inside a hot-air balloon has an average...Ch. 17 - Prob. 16PCECh. 17 - Consider the system described in the previous...Ch. 17 - Prob. 18PCECh. 17 - Prob. 19PCECh. 17 - If the translational speed of molecules in an...Ch. 17 - At what temperature is the rms speed of H2 equal...Ch. 17 - Suppose a planet has an atmosphere of pure ammonia...Ch. 17 - Prob. 23PCECh. 17 - Prob. 24PCECh. 17 - Prob. 25PCECh. 17 - What is the temperature of a gas of CO2 molecules...Ch. 17 - The rms speed of a sample of gas is increased by...Ch. 17 - Prob. 28PCECh. 17 - A 380-mL spherical flask contains 0.065 mol of an...Ch. 17 - Prob. 30PCECh. 17 - A rock climber hangs freely from a nylon rope that...Ch. 17 - BIO To stretch a relaxed biceps muscle 2.5 cm...Ch. 17 - A 22-kg chimpanzee hangs from the end of a...Ch. 17 - The Marianas Trench The deepest place in all the...Ch. 17 - Four cylindrical rods with various cross-sectional...Ch. 17 - Predict/Calculate A steel wire 4.1 m long...Ch. 17 - BIO Spiderweb An orb weaver spider with a mass of...Ch. 17 - Predict/Calculate Two rods of equal length (0.55...Ch. 17 - A piano wire 0.82 m long and 0.93 mm in diameter...Ch. 17 - The formation of ice from water is accompanied by...Ch. 17 - Vapor Pressure for Water Figure 17-35 shows a...Ch. 17 - Using the vapor-pressure curve given in Figure...Ch. 17 - Prob. 43PCECh. 17 - Prob. 44PCECh. 17 - Predict/Calculate The Vapor Pressure of CO2 A...Ch. 17 - Phase Diagram for Water The phase diagram for...Ch. 17 - Phase Diagram for CO2 The phase diagram for CO2 is...Ch. 17 - Prob. 48PCECh. 17 - How much heat must be removed from 1.96 kg of...Ch. 17 - A heat transfer of 9.5 105 J is required to...Ch. 17 - How much heat must be added to 2.55 kg of copper...Ch. 17 - An ammonia refrigeration cycle involves the...Ch. 17 - Prob. 53PCECh. 17 - Prob. 54PCECh. 17 - Prob. 55PCECh. 17 - Figure 17-30 shows a temperature-versus-heat plot...Ch. 17 - Predict/Calculate Suppose the 1.000 kg of water in...Ch. 17 - Prob. 58PCECh. 17 - When you go out to your car one cold winter...Ch. 17 - A large punch bowl holds 3.99 kg of lemonade...Ch. 17 - A 155-g aluminum cylinder is removed from a liquid...Ch. 17 - An 825-g iron block is heated to 352 C and placed...Ch. 17 - Party Planning You are expecting to serve 32 cups...Ch. 17 - Predict/Calculate A 35-g ice cube at 0.0 C is...Ch. 17 - A 48-g block of copper at 12 C is added to 110 g...Ch. 17 - A 0 075-kg ice cube at 0.0 C is dropped into a...Ch. 17 - To help keep her barn warm on cold days, a farmer...Ch. 17 - CE As you go up in attitude, do you expect the...Ch. 17 - Prob. 69GPCh. 17 - Prob. 70GPCh. 17 - Prob. 71GPCh. 17 - Cooling Computers Researchers are developing heat...Ch. 17 - Prob. 73GPCh. 17 - Prob. 74GPCh. 17 - Evaporating Atmosphere Hydrogen gas evaporates...Ch. 17 - Prob. 76GPCh. 17 - A Boiling Geyser (a) The column of water that...Ch. 17 - A Melting Glacier (a) A glacier is made of ice of...Ch. 17 - Peter catches a 4 2-kg striped bass on a fishing...Ch. 17 - A steel ball (density=7860kg/m3) with a diameter...Ch. 17 - A lead brick with the dimensions shown in Figure...Ch. 17 - (a) Find the amount of heat that must be extracted...Ch. 17 - Mighty Ice Lift A tremendous force is generated...Ch. 17 - Orthopedic Implants Metals such as titanium and...Ch. 17 - Students on a spring break picnic bring a cooler...Ch. 17 - A 5.9-kg block of ice at 1.5 C slides on a...Ch. 17 - A cylindrical copper rod 37 cm long and 7.5 cm in...Ch. 17 - Prob. 88PPCh. 17 - Prob. 89PPCh. 17 - Prob. 90PPCh. 17 - Prob. 91PPCh. 17 - Referring to Example 17-17 (a) Find the final...Ch. 17 - Referring to Example 17-17 (a) Find the final...
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