Lecture- Tutorials for Introductory Astronomy
3rd Edition
ISBN: 9780321820464
Author: Edward E. Prather, Tim P. Slater, Jeff P. Adams, Gina Brissenden
Publisher: Addison-Wesley
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Chapter 4, Problem 9SEP
To determine
The smaller lighted area of the given areas.
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A uniform ladder of length L and weight w is leaning against a vertical wall. The coefficient of static friction between the ladder and the floor is the same as that between the ladder and the wall. If this
coefficient of static friction is μs : 0.535, determine the smallest angle the ladder can make with the floor without slipping.
°
=
A 14.0 m uniform ladder weighing 480 N rests against a frictionless wall. The ladder makes a 55.0°-angle with the horizontal.
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horizontal force
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342.
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(b) If the ladder is just on the verge of slipping when the firefighter is 9.10 m from the bottom, what is the coefficient of static friction between ladder and ground?
0.26
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ma
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John is pushing his daughter Rachel in a wheelbarrow when it is stopped by a brick 8.00 cm high (see the figure below). The handles make an angle of 0 = 17.5° with the ground. Due to the weight of
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Chapter 4 Solutions
Lecture- Tutorials for Introductory Astronomy
Ch. 4 - Which Moon position (AE) best corresponds with the...Ch. 4 - In the blank boxes below, sketch how the Moon...Ch. 4 - Shade in each of the four Moons shown in Figure 2...Ch. 4 - Which Moon position (Fl) best corresponds with the...Ch. 4 - How much of the entire Moon’s surface is...Ch. 4 - How much of the Moon’s illuminated surface is...Ch. 4 - Would your answers to Questions 5 or 6 change if...Ch. 4 - Consider the following discussion between two...Ch. 4 - If the Moon is a full Moon tonight, will the Moon...Ch. 4 - Where (in the southern sky, on the eastern...
Ch. 4 - Where (in the southern sky, on the eastern...Ch. 4 -
Where (in the southern sky, on the eastern...Ch. 4 -
If the Moon is a new Moon when it rises, which of...Ch. 4 -
What time is it for the person shown in Figure...Ch. 4 -
Draw a stick figure person on Earth in Figure 1...Ch. 4 - Answer the following questions for the position of...Ch. 4 -
At what time would you look to see a...Ch. 4 -
If the Sun set below your western horizon about 2...Ch. 4 -
A friend comments to you that there was a...Ch. 4 - According to Figure 1, in which direction would...Ch. 4 - If it is wintertime right now (just after the...Ch. 4 - Since Figure 1 is a reasonable representation for...Ch. 4 - During what time(s) of year would the Sun...Ch. 4 - Does the Sun always set in precisely the same...Ch. 4 - What do the x’s in the shadow plots represent?
Ch. 4 - Approximately how much time went by from the time...Ch. 4 - Approximately how long did it take to create each...Ch. 4 - How does the direction of the stick’s shadow...Ch. 4 - Using Figures 1 and 2, in what direction would the...Ch. 4 - Clearly circle the x for the shadow that...Ch. 4 - Compare the position of the x that corresponds to...Ch. 4 - Which Shadow Plot (A or B) most closely...Ch. 4 - On Figure 2, sketch the Sun’s position shortly...Ch. 4 - Based on the shadow plots in Figure 2, during...Ch. 4 - If Shadow Plot A corresponds to the path of the...Ch. 4 - If Shadow Plot B corresponds to the path of the...Ch. 4 - If you were to mark the end of the stick’s shadow...Ch. 4 - Will the stick ever cast a shadow along the...Ch. 4 - Is there ever a clear (no clouds) day of the year...Ch. 4 - Is the direction that Earth’s axis is tilted...Ch. 4 - Using the information listed above, does Earth...Ch. 4 - Would you say the temperature stays approximately...Ch. 4 - Are the seasons (summer or winter) the same in the...Ch. 4 - Consider the following discussion between two...Ch. 4 - Do you think these differences in distance between...Ch. 4 - Consider the following discussion between two...Ch. 4 - Which of the two lighted areas (the one created by...Ch. 4 - Which of the two lighted areas is smaller?
Ch. 4 - Which of the two lighted areas receives more...Ch. 4 - If a thermometer were placed in each of the...Ch. 4 - Which of the two positions would be similar to the...Ch. 4 - Which location(s) (A–F) correspond(s) with summer...Ch. 4 - Which location(s) (A–F) correspond(s) with winter...Ch. 4 - During which season (summer or winter) is the...Ch. 4 - During which season (summer or winter) is the Sun...Ch. 4 - How are your answers to the previous two questions...Ch. 4 - How would the number of hours of sunlight and the...Ch. 4 - If, somehow, the number of daylight hours did not...Ch. 4 - If the Northern Hemisphere were tilted 90° toward...Ch. 4 - Provide two pieces of evidence to support the fact...Ch. 4 - Which two things are most directly responsible for...Ch. 4 - Given the data in Table 1, plot the motion of the...Ch. 4 - On what date was the mystery planet located...Ch. 4 - On what date was the mystery planet located...Ch. 4 - Describe how the mystery planet moved (east or...Ch. 4 - During which dates does the mystery planet appear...Ch. 4 - During which dates does this mystery planet appear...Ch. 4 - If a planet were moving with retrograde motion,...Ch. 4 - Suppose your instructor says that Mars is moving...Ch. 4 - Which direction (right or left) are the oceanic...Ch. 4 - Which is hotter, the piece of mantle material at...Ch. 4 - What direction are the pieces of mantle material...Ch. 4 - Consider the following discussion between two...Ch. 4 - Just beneath Point I on the drawing is a tropical...Ch. 4 - Just beneath Point C on the drawing is an ancient...Ch. 4 - Imagine that an impact occurred on the continental...Ch. 4 - Consider the image below of the rocky and...Ch. 4 - If a new planet were discovered, what evidence...Ch. 4 - Which TWO forms of light account for the majority...Ch. 4 - Consider the following debate between two students...Ch. 4 - Comparing the visible and the infrared types of...Ch. 4 - Comparing the ultraviolet and the infrared types...Ch. 4 - Based upon Figures 1 and 2, why is ultraviolet...Ch. 4 - What gas molecules are primarily responsible for...Ch. 4 - What are the two greenhouse gases most responsible...Ch. 4 - The Sun is approximately 6000 K at the surface and...Ch. 4 - Does Earth’s surface give off light at night? If...Ch. 4 - Consider the following debate between two students...Ch. 4 - Will the light given off by Earth’s surface easily...Ch. 4 - How does the total amount of energy coming from...Ch. 4 - What type of light primarily heats Earth’s surface...Ch. 4 - Is more energy absorbed by Earth’s surface in the...Ch. 4 - Due to the light absorbed by Earth’s surface that...Ch. 4 - Prob. 16GRPCh. 4 - Consider the following debate between two students...Ch. 4 - What was the temperature at the location of...Ch. 4 - What was the temperature at the location of Mars?
Ch. 4 - Which planets formed at temperatures hotter than...Ch. 4 - Which planets formed at temperatures cooler than...Ch. 4 - Over what range of distances from the Sun would...Ch. 4 - Over what range of distances from the Sun would...Ch. 4 - Is it likely that a large, Jovian planet would...Ch. 4 - Which of the following pairs of objects would make...Ch. 4 - Using small circles to represent Earth and the...Ch. 4 - To make a scale model of the Earth–Moon orbital...Ch. 4 - Can any combinations of the following items be...Ch. 4 - Does this mean that two Suns placed side-by-side...Ch. 4 - If you were to use a 1-foot (12-inch) basketball...Ch. 4 - If we used a basketball to represent the Sun and a...Ch. 4 - How many Moons would fit across the diameter of...Ch. 4 - Approximately how many times could the Moon’s...
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