CONCEPTUAL PHYSICS LL FD
12th Edition
ISBN: 9780135745816
Author: Hewitt
Publisher: PEARSON
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Chapter 17, Problem 84RCQ
To determine
Desalinizing of water by freezing.
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Maxwell's Mesh Analysis
1. The steel of the third rail of a railway system has a resistivity of 21.4 μ-cm. If its cross-sectional area
is 8.2 in², calculate the resistance per mile of rail, neglecting the effect of joints between sections. (1
point)
2. An incandescent lamp has a tungsten filament whose resistance is 96 at its operating temperature
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50 V
602
10 V
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b. the equivalent resistance with respect to the 50-V
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A
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C
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For items 8-9, refer to the problem below.
Find all the currents flowing in every resistor, power dissipation in
every resistor and the total power of the circuit shown at the right
using...
8. Kirchhoff's Laws (5 pts)
9. Maxwell's Mesh Analysis (5 pts)
A
8 V
10 V
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12 V
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Nature of Resistance
Temperature-Resistance Relationship
Ohm's Law, Energy and Power
Kirchhoff's Law
• Maxwell's Mesh Analysis
1. A coil of copper wire (p = 10.37 2-cmil/ft) has a length of 600 ft. What is the length of an aluminum conductor
(p 17 cmil/ft), if its cross-sectional area and resistance are the same as those of the copper coil? (Hint: Look
for conversion of inches to mils and square inches to square foot. Include it in your solution.) (1 pt)
2. The copper field winding of an electric machine has a resistance of 46 at temperature of 22°C. What will be
its resistance at 75°C? (Use do = 0.00427 /°C for copper) (1 pt)
3. The resistivity of a copper rod 50 ft long and 0.25 inch in diameter is 1.76 μ at 20°C. What is its resistance at -
20°C? (1 pt)
4. When two resistors A and B are connected in series, the total resistance is 36 2. When connected in parallel, the
total resistance is 8 Q. What is the ratio of the resistance RA to resistance RB? Assume RA < RB. (1 pt)
5. The…
Chapter 17 Solutions
CONCEPTUAL PHYSICS LL FD
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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- 2. Two equally strong individuals, wearing exactly the same shoes decide to do a tug of war. The only difference is individual A is 2.5 meters tall and individual B is 1.5 meter tall. Who is more likely to win the tug of war?arrow_forward6. A car drives at steady speed around a perfectly circular track. (a) The car's acceleration is zero. (b) The net force on the car is zero. (c) Both the acceleration and net force on the car point outward. (d) Both the acceleration and net force on the car point inward. (e) If there is no friction, the acceleration is outward.arrow_forward9. A spring has a force constant of 100 N/m and an unstretched length of 0.07 m. One end is attached to a post that is free to rotate in the center of a smooth. table, as shown in the top view in the figure below. The other end is attached to a 1kg disc moving in uniform circular motion on the table, which stretches the spring by 0.03 m. Friction is negligible. What is the centripetal force on the disc? Top View (a) 0.3 N (b) 3.0 N (c) 10 N (d) 300 N (e) 1000 Narrow_forward
- 4. A child has a ball on the end of a cord, and whirls the ball in a vertical circle. Assuming the speed of the ball is constant (an approximation), when would the tension in the cord be greatest? (a) At the top of the circle. (b) At the bottom of the circle. (c) A little after the bottom of the circle when the ball is climbing. (d) A little before the bottom of the circle when the ball is descending quickly. (e) Nowhere; the cord is pulled the same amount at all points.arrow_forward3. In a rotating vertical cylinder (Rotor-ride) a rider finds herself pressed with her back to the rotating wall. Which is the correct free-body diagram for her? (a) (b) (c) (d) (e)arrow_forward8. A roller coaster rounds the bottom of a circular loop at a nearly constant speed. At this point the net force on the coaster cart is (a) zero. (b) directed upward. (c) directed downward. (d) Cannot tell without knowing the exact speed.arrow_forward
- 5. While driving fast around a sharp right turn, you find yourself pressing against the left car door. What is happening? (a) Centrifugal force is pushing you into the door. (b) The door is exerting a rightward force on you. (c) Both of the above. (d) Neither of the above.arrow_forward7. You are flung sideways when your car travels around a sharp curve because (a) you tend to continue moving in a straight line. (b) there is a centrifugal force acting on you. (c) the car exerts an outward force on you. (d) of gravity.arrow_forward1. A 50-N crate sits on a horizontal floor where the coefficient of static friction between the crate and the floor is 0.50. A 20-N force is applied to the crate acting to the right. What is the resulting static friction force acting on the crate? (a) 20 N to the right. (b) 20 N to the left. (c) 25 N to the right. (d) 25 N to the left. (e) None of the above; the crate starts to move.arrow_forward
- 3. The problem that shall not be named. m A (a) A block of mass m = 1 kg, sits on an incline that has an angle 0. Find the coefficient of static friction by analyzing the system at imminent motion. (hint: static friction will equal the maximum value) (b) A block of mass m = 1kg made of a different material, slides down an incline that has an angle 0 = 45 degrees. If the coefficient of kinetic friction increases is μ = 0.5 what is the acceleration of the block? karrow_forward2. Which of the following point towards the center of the circle in uniform circular motion? (a) Acceleration. (b) Velocity, acceleration, net force. (c) Velocity, acceleration. (d) Velocity, net force. (e) Acceleration, net force.arrow_forwardProblem 1. (20 pts) The third and fourth stages of a rocket are coastin in space with a velocity of 18 000 km/h when a smal explosive charge between the stages separate them. Immediately after separation the fourth stag has increased its velocity to v4 = 18 060 km/h. Wha is the corresponding velocity v3 of the third stage At separation the third and fourth stages hav masses of 400 and 200 kg, respectively. 3rd stage 4th stagearrow_forward
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