EBK INQUIRY INTO PHYSICS
8th Edition
ISBN: 8220103599450
Author: Ostdiek
Publisher: Cengage Learning US
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Chapter 6, Problem 23P
. The sound level measured in a room by a person watching a movie on a home theater system varies from 65 dB during a quiet part to 95 dB during a loud part. Approximately how many times louder is the latter sound?
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Kirchoff's Laws. A circuit contains 3 known resistors, 2 known batteries, and 3 unknown currents as shown.
Assume the current flows through the circuit as shown (this is our initial guess, the actual currents may be
reverse). Use the sign convention that a potential drop is negative and a potential gain is positive.
E₂ = 8V
R₁₁ = 50
R₂ = 80
b
с
w
11
www
12
13
E₁ = 6V
R3 = 20
a) Apply Kirchoff's Loop Rule around loop abefa in the clockwise direction starting at point a. (2 pt).
b) Apply Kirchoff's Loop Rule around loop bcdeb in the clockwise direction starting at point b. (2 pt).
c) Apply Kirchoff's Junction Rule at junction b (1 pt).
d) Solve the above 3 equations for the unknown currents I1, 12, and 13 and specify the direction of the current
around each loop. (5 pts)
I1 =
A
12 =
A
13 =
A
Direction of current around loop abef
Direction of current around loop bcde
(CW or CCW)
(CW or CCW)
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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]
Chapter 6 Solutions
EBK INQUIRY INTO PHYSICS
Ch. 6 - An astronomer measures the speed of recession of a...Ch. 6 - Prob. 2AACh. 6 - Prob. 1MACh. 6 - Prob. 1PIPCh. 6 - Prob. 2PIPCh. 6 - Prob. 1MIOCh. 6 - Prob. 1QCh. 6 - (Indicates a review question, which means it...Ch. 6 - (Indicates a review question, which means it...Ch. 6 - (Indicates a review question, which means it...
Ch. 6 - Prob. 5QCh. 6 - Prob. 6QCh. 6 - (Indicates a review question, which means it...Ch. 6 - Prob. 8QCh. 6 - Prob. 9QCh. 6 - Prob. 10QCh. 6 - Prob. 11QCh. 6 - Prob. 12QCh. 6 - (Indicates a review question, which means it...Ch. 6 - Prob. 14QCh. 6 - (Indicates a review question, which means it...Ch. 6 - (Indicates a review question, which means it...Ch. 6 - Prob. 17QCh. 6 - (Indicates a review question, which means it...Ch. 6 - Prob. 19QCh. 6 - Prob. 20QCh. 6 - Prob. 21QCh. 6 - (Indicates a review question, which means it...Ch. 6 - Prob. 23QCh. 6 - Prob. 24QCh. 6 - Prob. 25QCh. 6 - Prob. 26QCh. 6 - Prob. 27QCh. 6 - Prob. 28QCh. 6 - Prob. 29QCh. 6 - (Indicates a review question, which means it...Ch. 6 - Prob. 31QCh. 6 - Prob. 32QCh. 6 - Prob. 33QCh. 6 - Prob. 34QCh. 6 - Prob. 35QCh. 6 - Prob. 36QCh. 6 - (Indicates a review question, which means it...Ch. 6 - Prob. 38QCh. 6 - Prob. 39QCh. 6 - Two children stretch a jump rope between them and...Ch. 6 - The force stretching the D string on a certain...Ch. 6 - What is the speed of sound in air at the normal...Ch. 6 - The coldest and hottest temperatures ever recorded...Ch. 6 - A 4-Hz continuous wave travels on a S1ink. If the...Ch. 6 - A 500-Hz sound trave1s through pure oxygen. The...Ch. 6 - Prob. 7PCh. 6 - What frequency of sound traveling in air at 20°C...Ch. 6 - Prob. 9PCh. 6 - . What is the wavelength of 3.5 million Hz...Ch. 6 - . The frequency of middle C on the piano is 261.6...Ch. 6 - . A cable with total length 30 m and mass 100 kg...Ch. 6 - . In a student laboratory exercise, the wavelength...Ch. 6 - . A 1,720-Hz pure tone is played on a stereo in an...Ch. 6 - . A person stands directly in front of Iwo...Ch. 6 - . Ultrasound probes can resolve structural details...Ch. 6 - . A sonic depth gauge is placed 5 m above the...Ch. 6 - . The huge volcanic eruption on the island of...Ch. 6 - . A baseball fan sitting in the cheap seals” is...Ch. 6 - . A geologist is camped 8,000 m (5 miles) from a...Ch. 6 - . A person stands at a point 300 m in front of the...Ch. 6 - . A sound pulse emitted underwater reflects off a...Ch. 6 - . The sound level measured in a room by a person...Ch. 6 - . Approximately how many times louder is a 100-dB...Ch. 6 - Prob. 25PCh. 6 - . The frequency of the highest note on the piano...Ch. 6 - Prob. 1CCh. 6 - Prob. 2CCh. 6 - Jack and Jill go for a walk along an abandoned...Ch. 6 - Prob. 4CCh. 6 - An entrepreneur decides to invent and market a...Ch. 6 - Prob. 6CCh. 6 - Prob. 7CCh. 6 - The frequency of the lowest note played on a flute...Ch. 6 - Prob. 9C
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