Applied Physics
11th Edition
ISBN: 9780132719865
Author: EWEN, Dale
Publisher: PEARSON
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Chapter 12, Problem 12RQ
To determine
Write the differences between adhesion and cohesion.
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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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3. For the circuit shown, find the following:
50 V
602
10 V
702
a. the value of resistor R. (1 point)
b. the equivalent resistance with respect to the 50-V
source. (1 point)
4. For the circuit shown, determine all the currents in each branch using Kirchhoff's Laws. (3 points)
A
5V 2
В
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C
4
6 VT
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E
5. Use Maxwell's Mesh to find I, and VAB…
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
B
+
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202
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C
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202
+
50
www
12 V
•
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 12 Solutions
Applied Physics
Ch. 12.2 - A packing crate 2.50m 0.80m 0.45m weighs 1.41 ...Ch. 12.2 - A packing crate 2.50 m 20.0 cm 30.0 cm has a...Ch. 12.2 - A spring is stretched 24.0 in. by a force of 54.0...Ch. 12.2 - A 17.0-N force stretches a wire 0.650 cm. (a) What...Ch. 12.2 - A force of 36.0 N stretches a spring 18.0 cm. Find...Ch. 12.2 - A force of 5.00 N is applied to a spring whose...Ch. 12.2 - Each vertical steel column of an office building...Ch. 12.2 - Each vertical steel column of an office building...Ch. 12.2 - If the compression of each steel column in Problem...Ch. 12.2 - A coiled spring is stretched 40.0 cm by a 5.00-N...
Ch. 12.2 - A 12,000-N load is hanging from a steel cable that...Ch. 12.2 - A rectangular cast-iron column 25.0 m 25.0 cm ...Ch. 12.2 - In a Hookes law experiment, the following weights...Ch. 12.2 - What was the original length of a spring with...Ch. 12.2 - A bar weighing 26.0 N is supported horizontally on...Ch. 12.2 - A firefighter weighs 725 N. She wears shoes that...Ch. 12.2 - Prob. 17PCh. 12.2 - The cross-sectional area of a wire is 2.50 103...Ch. 12.2 - A spring having a force constant of 1.25 N/cm is...Ch. 12.5 - Express mass density in kg/m3 and weight density...Ch. 12.5 - Express mass density in kg/m3 and weight density...Ch. 12.5 - If a block of wood of the size in Problem 2 has a...Ch. 12.5 - Find the volume (in cm3) of 1350 g of mercury.Ch. 12.5 - Find the volume (in cm3) of 1350g of cork.Ch. 12.5 - Find the volume (in m3) of 1350 g of nitrogen at...Ch. 12.5 - A block of gold 9.00 in. 8.00 in. 6.00 in....Ch. 12.5 - A cylindrical piece of copper is 9.00 in. tall and...Ch. 12.5 - A piece of aluminum of mass 6.24 kg displaces...Ch. 12.5 - If 1.00 pint of turpentine weighs 0.907 lb, what...Ch. 12.5 - Find the mass density of gasoline if 106 g...Ch. 12.5 - How much does 1.00 gal of gasoline weigh?Ch. 12.5 - Determine the volume (in m3) of 3045 kg of oil.Ch. 12.5 - How many ft3 will 573 lb of water occupy?Ch. 12.5 - If 20.4 in3 of linseed oil weighs 0.694 lb, what...Ch. 12.5 - Prob. 16PCh. 12.5 - Find the volume of 3.00 kg of propane at 0C and 1...Ch. 12.5 - Granite has a mass density of 2650 kg/m3. Find its...Ch. 12.5 - Find the mass density of a metal block 18.0 cm ...Ch. 12.5 - Find the mass (in kg) of 1.00 m3 of (a) water, (b)...Ch. 12.5 - What size tank (in litres) is needed for 1000 kg...Ch. 12.5 - Copper has a mass density of 8890 kg/m3. Find its...Ch. 12.5 - What is the mass of gasoline in a 1250-litre gas...Ch. 12.5 - If racing alcohol has a mass density of 790 kg/m3,...Ch. 12.5 - Use Table 12.2 to find the specific gravity of...Ch. 12.5 - Use Table 12.2 to find the specific gravity of...Ch. 12.5 - Use Table 12.2 to find the specific gravity of...Ch. 12.5 - Use Table 12.2 to find the specific gravity of...Ch. 12.5 - Use Table 12.2 to find the specific gravity of...Ch. 12.5 - Use Table 12.2 to find the specific gravity of...Ch. 12.5 - The specific gravity of material X is 0.82. Does...Ch. 12.5 - The specific gravity of material Y is 1.7. Does it...Ch. 12.5 - The specific gravity of material Z is 0.52. Does...Ch. 12.5 - The specific gravity of material W is 11.5. Does...Ch. 12.5 - A proton has mass 1.67 1027 kg and diameter 8.2 ...Ch. 12.5 - Find the mass density of a 315-g object that...Ch. 12.5 - What is the mass density of a 500 g block that...Ch. 12 - Prob. 1RQCh. 12 - Prob. 2RQCh. 12 - The common industrial method used to measure the...Ch. 12 - Prob. 4RQCh. 12 - Prob. 5RQCh. 12 - Capillary action refers to a. the mixing of...Ch. 12 - The relationship of the change in length of a...Ch. 12 - The ability of the surface of water to support a...Ch. 12 - In your own words, describe the difference between...Ch. 12 - Would the mass density of an object be the same if...Ch. 12 - In your own words, describe capillary action.Ch. 12 - Prob. 12RQCh. 12 - Give one example of the effect of surface tension...Ch. 12 - The mass of a proton is approximately _____ times...Ch. 12 - The applied force divided by the area over which...Ch. 12 - In your own words, state Hooke's law.Ch. 12 - The commonly used unit of stress in the metric...Ch. 12 - Describe how to find the specific gravity of an...Ch. 12 - What is the ratio of mass to volume called?Ch. 12 - What is friction in liquids called?Ch. 12 - A spring that has been permanently deformed is...Ch. 12 - List the three states of matter.Ch. 12 - Distinguish between a molecule and an atom.Ch. 12 - Distinguish between a neutron and a proton.Ch. 12 - List the five basic stresses.Ch. 12 - Explain how a hydrometer measures the charge in a...Ch. 12 - A force of 32.5 N stretches a wire 0.470 cm. What...Ch. 12 - A force of 7.33 N is applied to a spring whose...Ch. 12 - Each vertical steel column of an office building...Ch. 12 - A rectangular cast-iron column 16.0 cm 16.0 cm ...Ch. 12 - Find the weight density of a block of metal 7.00...Ch. 12 - A cylindrical piece of aluminum is 4.25 cm tall...Ch. 12 - A piece of metal has a mass of 8.36 kg. If it...Ch. 12 - A block of wood is 27.7 in. 36.3 in. 12.4 in....Ch. 12 - Find the volume (in cm3) of 759 g of mercury.Ch. 12 - Find the volume (in m3) of 1970 g of hydrogen at...Ch. 12 - Find the mass of 1510 m3 of oxygen at 0C and 1...Ch. 12 - Find the weight of 951 ft3 of water.Ch. 12 - Find the weight density of a block of material...Ch. 12 - Find the weight density of 2.00 quarts of liquid...Ch. 12 - A quantity of liquid weighs 4.65 lb with a weight...Ch. 12 - The density of a metal is 694 kg/m3. Find its...Ch. 12 - A solid displaces 4.30 gal of water and has a...Ch. 12 - Find the mass of a rectangular gold bar 4.00 cm ...Ch. 12 - Find the mass density of a chunk of rock using...Ch. 12 - The specific gravity of an unknown substance is...Ch. 12 - Instead of carrying a full-size spare tire, many...Ch. 12 - Observe the warped lines on asphalt pavement in...Ch. 12 - Raul weighs 235 lb and is able to float in...Ch. 12 - A tanker truck with a cylindrical container 11.3 m...Ch. 12 - Every morning Shakira weighs herself on a bathroom...
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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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