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Glencoe Physics: Principles and Problems �1999 (Homework)

James Finch

Physics - High School, section 001, Fall 2019

Instructor: Dr. Friendly

Current Score : 16 / 23

Due : Sunday, August 18, 2019 21:00 EDT

Last Saved : n/a Saving...  ()

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Total
16/23 (69.6%)

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    Here are some textbook questions from Glencoe Physics: Principles and Problems �1999 published by Glencoe/McGraw-Hill. Click here for a list of all of the questions coded in WebAssign. This demo assignment allows many submissions and allows you to try another version of the same question for practice.

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1. –/7 points Glencoe99 2.P.44. My Notes
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Figure 2-14 shows the mass of three substances for volumes between 0 and 60 cm3.


Figure 2.14

(a) What is the mass of 30 cm3 of each substance?
(No Response) seenKey

425

 g (top)
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260

 g (middle)
(No Response) seenKey

80

 g (bottom)

(b) If you had 100 g of each substance, what would their volumes be?
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7

cm3 (top)
(No Response) seenKey

11

 cm3 (middle)
(No Response) seenKey

34

 cm3 (bottom)

(c) In one or two sentences, describe the meaning of the steepness of the lines in this graph.
(No Response)
Key: The steepness represents the increased mass of each additional cubic centimeter of the substance.

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2. –/4 points Glencoe99 5.P.45. My Notes
Question Part
Points
Submissions Used
1 2 3 4
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–/4
 
Use Figure 5-26 to find the acceleration of the moving object during the following time intervals.


Figure 5.26

(a) during the first 5 s of travel
(No Response) seenKey

6

 m/s2
(b) between the fifth and the tenth second of travel
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0

 m/s2
(c) between the tenth and the 15th second of travel
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-2

 m/s2
(d) between the 20th and 25th second of travel
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-4

 m/s2
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3. –/1 points Glencoe99 7.P.34. My Notes
Question Part
Points
Submissions Used
1
–/1
0/50
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–/1
 
Joe wishes to hang a sign weighing 775 N so that cable A attached to the store makes a 30.0° angle, as shown in Figure 7-16. Cable B is horizontal and attached to an adjoining building. What is the tension in cable B?
(No Response) seenKey

447

 N


Figure 7-16

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4. –/4 points Glencoe99 7.P.54. My Notes
Question Part
Points
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1 2 3 4
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–/4
 
The carnival ride shown in Figure 7-18 has a 2.1 m radius and rotates once each 0.90 s.


Figure 7-18

(a) Find the speed of a rider.
(No Response) seenKey

14.7

 m/s
(b) Find the centripetal acceleration of a rider.
(No Response) seenKey

102

 m/s2
(c) What produces this acceleration?
(No Response)
Key: Force of the drum walls

This answer has not been graded yet.


(d) When the floor drops down, riders are held up by friction. Draw motion and free-body diagrams of the situation. (Do this on paper. Your instructor may ask you to turn in this work.)
(e) What coefficient of static friction is needed to keep the riders from slipping?
(No Response) seenKey

0.0958
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5. –/7 points Glencoe99 8.CT.59. My Notes
Question Part
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1 2 3 4 5 6 7
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–/7
 
Some people say that the tides on Earth are caused by the pull of the moon. Let us investigate whether this is true.


Figure 8-13

(a) Determine the forces that the moon and the sun exert on a mass, m, of water on Earth. Your answer will be in terms of m with units of N.
(No Response) seenKey

3.33e-05

 m N (force exerted by moon)
(No Response) seenKey

0.00593

 m N (force exerted by sun)(b) Which celestial body, the sun or the moon, has a greater pull on the waters of Earth?
    

(c) Determine the difference in force exerted by the moon on the water at the near surface and the water at the far surface (on the opposite side of Earth), as illustrated in Figure 8-13. Again, your answer will be in terms of m with units of N.
(No Response) seenKey

2.21e-06

 m N
(d) Determine the difference in force exerted by the sun on water at the near surface and water at the far surface (on the opposite side of Earth).
(No Response) seenKey

1.01e-06

 m N(e) Which celestial body has a greater difference in pull from one side of Earth to the other?
    

(f) Why is the statement that the tides are due to the pull of the moon misleading? Make a correct statement to explain how the moon causes tides on Earth.
(No Response)
Key: The tides are due to the difference between the pull of the moon on Earth's near side and Earth's far side.

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