Foundations of Astronomy
13th Edition
ISBN: 9781305079151
Author: Michael A. Seeds, Dana Backman
Publisher: Cengage Learning
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Chapter 19, Problem 26RQ
To determine
Identify the planet.
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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
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11
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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)
No chatgpt pls will upvote
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 19 Solutions
Foundations of Astronomy
Ch. 19 - Why is the solar nebula theory considered a theory...Ch. 19 - Why was the nebular hypothesis never fully...Ch. 19 - What produced the helium now present in the Suns...Ch. 19 - What produced the iron and heavier elements such...Ch. 19 - Prob. 5RQCh. 19 - What evidence can you give that disks of gas and...Ch. 19 - According to the solar nebula theory, why is...Ch. 19 - Prob. 8RQCh. 19 - Prob. 9RQCh. 19 - Why does the solar nebula theory predict that...
Ch. 19 - What evidence can you give that the Solar System...Ch. 19 - Prob. 12RQCh. 19 - Prob. 13RQCh. 19 - Prob. 14RQCh. 19 - Prob. 15RQCh. 19 - Prob. 16RQCh. 19 - Prob. 17RQCh. 19 - Prob. 18RQCh. 19 - Prob. 19RQCh. 19 - Prob. 20RQCh. 19 - Prob. 21RQCh. 19 - What planet in the Solar System is larger than the...Ch. 19 - Why is almost every solid surface in the Solar...Ch. 19 - Prob. 24RQCh. 19 - Prob. 25RQCh. 19 - Prob. 26RQCh. 19 - What is the difference between condensation and...Ch. 19 - Why dont Terrestrial planets have ring systems...Ch. 19 - How does the solar nebula theory help you...Ch. 19 - Prob. 30RQCh. 19 - If rocks obtained from the Moon indicate an age of...Ch. 19 - Which is older, the Moon or the Sun? How do you...Ch. 19 - How does the solar nebula theory explain the...Ch. 19 - Did hydrogen gas condense from the nebula as the...Ch. 19 - Prob. 35RQCh. 19 - What happens if a planet has differentiated? Would...Ch. 19 - Order the following steps in the formation of a...Ch. 19 - Which step(s) listed in the previous question can...Ch. 19 - Describe two processes that could melt the...Ch. 19 - What is the evidence that Jupiter and Saturn are...Ch. 19 - Describe two processes that cleared the solar...Ch. 19 - What is the difference between a planetesimal and...Ch. 19 - Does Uranus have enough mass to have formed by...Ch. 19 - What properties of the gas and dust disks observed...Ch. 19 - Why would the astronomically short lifetime of gas...Ch. 19 - Prob. 46RQCh. 19 - Prob. 47RQCh. 19 - Describe three methods to find extrasolar planets.Ch. 19 - Why is the existence of hot Jupiters puzzling?...Ch. 19 - Prob. 50RQCh. 19 - The evidence is overwhelming that the Grand Canyon...Ch. 19 - Prob. 52RQCh. 19 - Prob. 1DQCh. 19 - Prob. 2DQCh. 19 - Prob. 3DQCh. 19 - Prob. 4DQCh. 19 - Prob. 5DQCh. 19 - Prob. 6DQCh. 19 - If you observed the Solar System from the vantage...Ch. 19 - Venus can be as bright as apparent magnitude 4.7...Ch. 19 - What is the smallest-diameter crater you can...Ch. 19 - Prob. 4PCh. 19 - Prob. 5PCh. 19 - You analyze a sample of a meteorite that landed on...Ch. 19 - You analyze a sample of a meteorite that landed on...Ch. 19 - Prob. 8PCh. 19 - Examine Table 18-2. What might a planets...Ch. 19 - Examine Table 18-2. What might a planets...Ch. 19 - Suppose that Earth grew to its present size in 10...Ch. 19 - Prob. 12PCh. 19 - Prob. 13PCh. 19 - What do you see in this image that indicates this...Ch. 19 - Why do astronomers conclude that the surface of...Ch. 19 - Prob. 3LTLCh. 19 - Prob. 4LTL
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