Conceptual Physics / MasteringPhysics (Book & Access Card)
12th Edition
ISBN: 9780321908605
Author: Paul G. Hewitt
Publisher: PEARSON
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Chapter 1, Problem 29RCQ
If Earth were smaller than it is, but the Alexandria-to-Syene distance were the same, would the shadow of the vertical pillar in Alexandria be longer or shorter at noon during the summer solstice?
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If Earth were smaller than it is, but the Alexandria-to-Syene distance were the same, would the shadow of the vertical pillar in Alexandria be longer or shorter at noon during the summer solstice?
The shadow cast by a vertical pillar in Alexandria at noon during the summer solstice is found to be 1/8 the height of the pillar. The distance between Alexandria and Syene is 1/8 Earth’s radius. Is there a geometric connection between these two 1-to-8 ratios?
What is the difference between a sidereal month and a synodic month? Which is longer?
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Chapter 1 Solutions
Conceptual Physics / MasteringPhysics (Book & Access Card)
Ch. 1 - Prob. 1RCQCh. 1 - Prob. 2RCQCh. 1 - When the Sun was directly overhead in Syene, why...Ch. 1 - Earth, like everything else illuminated by the...Ch. 1 - How does the Moon's diameter compare with the...Ch. 1 - Prob. 6RCQCh. 1 - Why did Aristarchus choose the time of a half Moon...Ch. 1 - What are the circular spots of light seen on the...Ch. 1 - What is the role of equations in this book?Ch. 1 - Outline some steps of the scientific method.
Ch. 1 - Distinguish among a scientific fact, a hypothesis,...Ch. 1 - In daily life, people are often praised for...Ch. 1 - What is the test for whether a hypothesis is...Ch. 1 - Prob. 14RCQCh. 1 - What test can you perform to increase the chance...Ch. 1 - Why are students of the arts encouraged to learn...Ch. 1 - Must people choose between science and religion?Ch. 1 - Psychological comfort is a benefit of having solid...Ch. 1 - Clearly distinguish between science and...Ch. 1 - Why is physics considered to be the basic science?Ch. 1 - Poke a hole in a piece of cardboard and hold the...Ch. 1 - Choose a particular day in the very near...Ch. 1 - What is the penalty for scientific fraud in the...Ch. 1 - Which of the following are scientific hypotheses?...Ch. 1 - Prob. 25RCQCh. 1 - Prob. 26RCQCh. 1 - What is probably being misunderstood by a person...Ch. 1 - The shadow cast by a vertical pillar in Alexandria...Ch. 1 - If Earth were smaller than it is, but the...Ch. 1 - The great philosopher and mathematician Bertrand...Ch. 1 - Bertrand Russell wrote, u I think we must retain...Ch. 1 - Your favorite young relative is wondering whether...
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- Suppose Eratosthenes had found that, in Alexandria, at noon on the first day of summer, the line to the Sun makes an angle 30° with the vertical. What, then, would he have found for Earth’s circumference?arrow_forwardIn a part of Earth’s orbit where Earth is moving faster than usual around the Sun, would the length of the solar day change? If so, how? Explain.arrow_forwardWhat phases would Venus show if the geocentric model were correct?arrow_forward
- How many days are there in 12 lunar months (synodic months)?arrow_forwardWhich of the following is not a contributing factor in causing eclipses? (17.2) (a) the rotation of the Earth about its axis (b) the inclination of the Moons orbit (c) the varying distance between the Earth and the Moon (d) the varying distance between the Earth and the Sunarrow_forwardPretend the Moons orbit around Earth is a perfect circle. How long does it take in units of days for the Moon to move 90 degrees relative to the stars? Is this number dependent on the synodic period or the sidereal period?arrow_forward
- On the day of the vernal equinox, the day length for all places on Earth is actually slightly longer than 12 hours. Explain why.arrow_forwardDescribe in detail the motions of the planets according to Ptolemy.arrow_forwardThe Earth covers about 1° per day in its orbit about the Sun, and the solar day is slightly longer than the sidereal day. If Earth spun in a retrograde direction like Venus but it still had the same sidereal period (23 hr 56 min), how long would the solar day be? The solar day would be 72 hr and min.arrow_forward
- How would Eratosthenes’s estimate have been different if the sun were actually closer to Earth?arrow_forwardTonight you see a waning crescent in the night sky. A few (n) days later, the night is once again clear and you see a waning crescent. How many degrees did the Moon advance in its orbit during this time frame?arrow_forwardWhat ancient evidence was found for a spherical Earth? (This question will show a checkbox next to each answer, and you must select ALL the correct answers and none of the wrong ones) the different angles of equinox shadows measured at cities in Egypt by Eratosthenes the curved shape of Earth's lunar eclipse shadow Circumnavigation of the earth the subtle curvature of the horizon sighted by the Greek astronomer, Metaxa The Pythagorean Theoremarrow_forward
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