Physics of Everyday Phenomena
9th Edition
ISBN: 9781259894008
Author: W. Thomas Griffith, Juliet Brosing Professor
Publisher: McGraw-Hill Education
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Chapter 12, Problem 33CQ
To determine
Which point B or C in the diagram having the higher electric potential.
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Part A:
kg
(a) Water at 20 °C (p = 998.3 and v = 1 × 10-6 m²/s) flows through a galvanised
m³
iron pipe (k = 0.15 mm) with a diameter of 25 mm, entering the room at point A and
discharging at point C from the fully opened gate valve B at a volumetric flow rate of
0.003 m³/s. Determine the required pressure at A, considering all the losses that occur
in the system described in Figure Q1. Loss coefficients for pipe fittings have been
provided in Table 1.
[25 marks]
(b) Due to corrosion within the pipe, the average flow velocity at C is observed to be
V2 m/s after 10 years of operation whilst the pressure at A remains the same as
determined in (a). Determine the average annual rate of growth of k within the pipe.
[15 marks]
4₁
Figure Q1. Pipe system
Page 2
25 mm
For an independent study project, you design an experiment to measure the speed of light. You propose to bounce laser light off a mirror that is 53.5 km due east and have it detected by a light sensor that is 119 m due south of the laser. The first problem is to orient the mirror so that the laser light reflects off the mirror and into the light sensor.
(a) Determine the angle that the normal to the mirror should make with respect to due west.(b) Since you can read your protractor only so accurately, the mirror is slightly misaligned and the actual angle between the normal to the mirror and due west exceeds the desired amount by 0.003°. Determine how far south you need to move the light sensor in order to detect the reflected laser light.
Chapter 12 Solutions
Physics of Everyday Phenomena
Ch. 12 - When two different materials are rubbed together,...Ch. 12 - Two pith balls are both charged by contact with a...Ch. 12 - When a glass rod is rubbed by a nylon cloth, which...Ch. 12 - Two pith balls are charged by touching one to a...Ch. 12 - Do the two metal-foil leaves of an electroscope...Ch. 12 - If you charge an electroscope with a plastic rod...Ch. 12 - When you comb your hair with a plastic comb, what...Ch. 12 - Describe how Benjamin Franklins single-fluid model...Ch. 12 - If you touch the metal ball of a charged...Ch. 12 - If you touch the ball of a charged electroscope...
Ch. 12 - When a metal ball is charged by induction using a...Ch. 12 - If, when charging by induction, you remove the...Ch. 12 - Will bits of paper be attracted to a charged rod...Ch. 12 - Why are pith balls initially attracted to a...Ch. 12 - Are electrostatic precipitators (see everyday...Ch. 12 - Can the pollutant carbon dioxide be readily...Ch. 12 - Can scrubbers (see everyday phenomenon box 12.1)...Ch. 12 - Is the concept of torque involved in the operation...Ch. 12 - If you had several identical metal balls mounted...Ch. 12 - If the distance between two charged objects is...Ch. 12 - If two charges are both doubled in magnitude...Ch. 12 - Can both the electrostatic force and the...Ch. 12 - Two charges, of equal magnitude but opposite sign,...Ch. 12 - Is it possible for an electric field to exist at...Ch. 12 - If we change the negative charge in the diagram...Ch. 12 - Three equal positive charges are located at the...Ch. 12 - Is the electric field produced by a single...Ch. 12 - If we move a positive charge toward a negative...Ch. 12 - Prob. 29CQCh. 12 - If a negative charge is moved in the same...Ch. 12 - Prob. 31CQCh. 12 - Is electric potential the same as electric...Ch. 12 - Prob. 33CQCh. 12 - Prob. 34CQCh. 12 - Would you be more likely to be struck by lightning...Ch. 12 - During a thunderstorm, why can a much greater flow...Ch. 12 - If in a typical thundercloud the bottom of the...Ch. 12 - Which is better during a thunderstorm: being in...Ch. 12 - Prob. 39CQCh. 12 - An electron has a charge of 1.6 1019 C. How many...Ch. 12 - Two identical brass balls mounted on wooden posts...Ch. 12 - Two identical steel balls mounted on wooden posts...Ch. 12 - Two charged particles exert an electrostatic force...Ch. 12 - Two charged particles exert an electrostatic force...Ch. 12 - Two negative charges, each of magnitude 5 106 C,...Ch. 12 - A charge of +3 106 C is located 21 cm from a...Ch. 12 - An electron and a proton have charges of an equal...Ch. 12 - A uniform electric field is directed upward and...Ch. 12 - A test charge of +12 106 C experiences a downward...Ch. 12 - A +3.4 106 C test charge experiences forces from...Ch. 12 - A charge of 5.8 106 C is placed at a point in...Ch. 12 - A charge of +0.18 C is moved from a position where...Ch. 12 - Prob. 14ECh. 12 - The potential energy of a +8 106 C charge...Ch. 12 - The electric potential increases from 52 V to 367...Ch. 12 - Three positive charges are located along a line,...Ch. 12 - Suppose that two equal positive charges lie near...Ch. 12 - Suppose that one of the two charges in synthesis...Ch. 12 - Suppose that four equal positive charges are...Ch. 12 - Suppose that the top plate of a parallel-plate...
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