Bundle: Foundations Of Astronomy, 14th + Mindtap Astronomy, 1 Term (6 Months) Printed Access Card
14th Edition
ISBN: 9780357000427
Author: Michael A. Seeds, Dana Backman
Publisher: Cengage Learning
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Chapter 21, Problem 13RQ
Where is the oxygen on Mars today? How do you know?
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Portfolio Problem 3. A ball is thrown vertically upwards with a speed vo
from the floor of a room of height h. It hits the ceiling and then returns to the
floor, from which it rebounds, managing just to hit the ceiling a second time.
Assume that the coefficient of restitution between the ball and the floor, e, is
equal to that between the ball and the ceiling. Compute e.
Portfolio Problem 4. Consider two identical springs, each with natural length
and spring constant k, attached to a horizontal frame at distance 2l apart. Their
free ends are attached to the same particle of mass m, which is hanging under
gravity. Let z denote the vertical displacement of the particle from the hori-
zontal frame, so that z < 0 when the particle is below the frame, as shown in
the figure. The particle has zero horizontal velocity, so that the motion is one
dimensional along z.
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(a) Show that the total force acting on the particle is
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(b) Find the potential energy U(x, y, z) of the system such that U
x = : 0.
= O when
(c) The particle is pulled down until the springs are each of length 3l, and then
released. Find the velocity of the particle when it crosses z = 0.
In the figure below, a semicircular conductor of radius R = 0.260 m is rotated about the axis AC at a constant rate of 130 rev/min. A uniform magnetic field of magnitude 1.22 T fills the entire region below the axis and is directed out of the page.
R
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(a) Calculate the maximum value of the emf induced between the ends of the conductor.
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(b) What is the value of the average induced emf for each complete rotation?
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(c) How would your answers to parts (a) and (b) change if the magnetic field were allowed to extend a distance R above the axis of rotation? (Select all that apply.)
The value in part (a) would increase.
The value in part (a) would remain the same.
The value in part (a) would decrease.
The value in part (b) would increase.
The value in part (b) would remain the same.
The value in part (b) would decrease.
×
(d) Sketch the emf versus time when the field is as drawn in the figure. Choose File No file chosen
This answer has not been graded yet.
(e) Sketch the emf…
Chapter 21 Solutions
Bundle: Foundations Of Astronomy, 14th + Mindtap Astronomy, 1 Term (6 Months) Printed Access Card
Ch. 21 - Describe four ways Venus is similar to Earth...Ch. 21 - Why might you expect that Venuss surface...Ch. 21 - Describe and explain changes in Venuss surface...Ch. 21 - Describe sources and sinks of CO2, if any, on...Ch. 21 - Does Venuss surface experience meteorite impacts...Ch. 21 - Describe evidence of crustal movement (horizontal...Ch. 21 - Why isnt the crust of Venus broken into mobile...Ch. 21 - Do either Venus or Mars have composite volcanoes?...Ch. 21 - What evidence can you give that Venus once had...Ch. 21 - What evidence shows that Venus has been resurfaced...
Ch. 21 - Describe four ways Mars is similar to Earth today....Ch. 21 - How are todays atmospheres of Venus and Mars...Ch. 21 - Where is the oxygen on Mars today? How do you...Ch. 21 - Why doesnt Mars have folded mountain ranges like...Ch. 21 - Why isnt the crust of Mars broken into mobile...Ch. 21 - What were the canals on Mars eventually found to...Ch. 21 - How can planetary scientists estimate the ages of...Ch. 21 - Propose an explanation for the nearly pure CO2...Ch. 21 - Prob. 19RQCh. 21 - Describe sources and sinks of CO2, if any, on Mars...Ch. 21 - Does Marss surface experience any meteorite...Ch. 21 - Describe evidence of crustal movement (horizontal...Ch. 21 - What surface features on Mars today indicate that...Ch. 21 - Why are Phobos and Deimos non-spherical? Why is...Ch. 21 - How are a weather radar map and an image of a...Ch. 21 - Atmospheric jet streams on Venus travel at about...Ch. 21 - How long would radio signals take to travel from...Ch. 21 - What is the maximum angular diameter of Venus as...Ch. 21 - The Pioneer Venus orbiter circled Venus with a...Ch. 21 - Calculate the velocity of Venus as it orbits the...Ch. 21 - Prob. 6PCh. 21 - If the Magellan spacecraft transmitted radio...Ch. 21 - Prob. 8PCh. 21 - What is the angular size of Phobos observed from...Ch. 21 - Prob. 10PCh. 21 - Prob. 11PCh. 21 - Deimos is about 13 km in diameter and has a...Ch. 21 - Prob. 1SOPCh. 21 - Mercury averages only 0.39 AU from the Sun, Venus...Ch. 21 - The radius of Mars is about 3400 km, and its moons...Ch. 21 - Look at Figure 21-1. Compare temperature profiles...Ch. 21 - Look at the map of the Hawaiian chain of islands...Ch. 21 - Look at Figure 21-11. Which molecule(s) can escape...Ch. 21 - Volcano Sif Mons on Venus is shown in this radar...Ch. 21 - Olympus Mons on Mars is an enormous volcano. In...
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- Portfolio Problem 2. A particle of mass m slides in a straight line (say along i) on a surface, with initial position x ©0 and initial velocity Vo > 0 at t = 0. The = particle is subject to a constant force F = -mai, with a > 0. While sliding on the surface, the particle is also subject to a friction force v Ff = -m fo = −m fov, with fo > 0, i.e., the friction force has constant magnitude mfo and is always opposed to the motion. We also assume fo 0, and solve it to find v(t) and x(t). How long does it take for the particle to come to a stop? How far does it travel? (b) After coming to a stop, the particle starts sliding backwards with negative velocity. Write the equation of motion in this case, and solve it to find the time at which the particle returns to the original position, x = 0. Show that the final speed at x 0 is smaller than Vo. = Express all your answers in terms of a, fo and Vo.arrow_forward= Portfolio Problem 1. A particle of mass m is dropped (i.e., falls down with zero initial velocity) at time t 0 from height h. If the particle is subject to gravitational acceleration only, i.e., a = −gk, determine its speed as it hits the ground by solving explicitly the expressions for its velocity and position. Next, verify your result using dimensional analysis, assuming that the general relation is of the form v = khag³m, where k is a dimensionless constant.arrow_forwardReview Conceptual Example 2 before attempting this problem. Two slits are 0.158 mm apart. A mixture of red light (wavelength = 693 nm) and yellow-green light (wavelength = 567 nm) falls on the slits. A flat observation screen is located 2.42 m away. What is the distance on the screen between the third-order red fringe and the third-order yellow- green fringe? m = 3 m = 3 m= 0 m = 3 m = 3 Fringes on observation screenarrow_forward
- In the figure below, a semicircular conductor of radius R = 0.260 m is rotated about the axis AC at a constant rate of 130 rev/min. A uniform magnetic field of magnitude 1.22 T fills the entire region below the axis and is directed out of the page. In this illustration, a wire extends straight to the right from point A, then curves up and around in a semicircle of radius R. On the right side of the semicircle, the wire continues straight to the right to point C. The wire lies in the plane of the page, in a region of no magnetic field. Directly below the axis A C is a region of uniform magnetic field pointing out of the page, vector Bout. If viewed from the right, the wire can rotate counterclockwise, so that the semicircular part can rotate into the region of magnetic field. (a) Calculate the maximum value of the emf induced between the ends of the conductor. V(b) What is the value of the average induced emf for each complete rotation? Consider carefully whether the correct answer is…arrow_forwardA coil of 15 turns and radius 10.0 cm surrounds a long solenoid of radius 2.20 cm and 1.00 103 turns/meter (see figure below). The current in the solenoid changes as I = 6.00 sin(120t), where I is in amperes and t is in seconds. Find the induced emf (in volts) in the 15-turn coil as a function of time. (Do not include units in your answer.) =arrow_forwardA coil of 15 turns and radius 10.0 cm surrounds a long solenoid of radius 1.80 cm and 1.00 103 turns/meter (see figure below). The current in the solenoid changes as I = 5.00 sin(120t), where I is in amperes and t is in seconds. Find the induced emf (in volts) in the 15-turn coil as a function of time. (Do not include units in your answer.) =arrow_forward
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