12th Edition

ISBN: 9781265774660

Author: Tillery

Publisher: MCG

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If a very smooth ball is rolled down an inclined surface with zero friction, the ball will continue to roll indefinitely for an infinite time, in an attempt to reach to the same height on the opposite hill!

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Textbook Question

Chapter 20, Problem 4QFT

Describe three ways in which a river erodes its channel.

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Chapter 20, Problem 3QFT

Chapter 20, Problem 5QFT

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Race car driver is cruising down the street at a constant speed of 28.9 m/s (~65 mph; he has a “lead” foot) when the traffic light in front of him turns red. a) If the driver’s reaction time is 160 ms, how far does he and his car travel down the road from the instant he sees the light change to the instant he begins to slow down? b) If the driver’s combined reaction and movement time is 750 ms, how far do he and his car travel down the road from the instant he sees the light change to the instant he slams on her brakes and car begins to slow down? Please answer parts a-B. Show all work. For each question draw a diagram to show the vector/s. Show all the step and provide units in the answers. Provide answer to 2 decimal places. DONT FORGET TO DRAW VECTORS! ONLY USE BASIC FORMULAS TAUGHT IN PHYSICS. distance = speed * time.

Race car driver is cruising down the street at a constant speed of 28.9 m/s (~65 mph; he has a “lead” foot) when the traffic light in front of him turns red. a) If the driver’s reaction time is 160 ms, how far does he and his car travel down the road from the instant he sees the light change to the instant he begins to slow down? b) If the driver’s combined reaction and movement time is 750 ms, how far do he and his car travel down the road from the instant he sees the light change to the instant he slams on her brakes and car begins to slow down? c) If the driver’s average rate of acceleration is -9.5 m/s2 as he slows down, how long does it take him to come to a stop (use information about his speed of 28.9 m/s but do NOT use his reaction and movement time in this computation)? Please answer parts a-c. Show all work. For each question draw a diagram to show the vector/s. Show all the step and provide units in the answers. Provide answer to 2 decimal places unless stated otherwise.…

How is it that part a is connected to part b? I can't seem to solve either part and don't see the connection between the two.

Chapter 20 Solutions

PHYSICAL SCIENCE (LCPO)

Ch. 20 - 1. Small changes that result in the breaking up,...Ch. 20 - 2. The process of physically removing weathered...Ch. 20 - 3. Muddy water rushing downstream after a heavy...Ch. 20 - 4. The physical breakup of rocks without any...Ch. 20 - 5. Chemical weathering, the dissolving or...Ch. 20 - 6. The process of peeling off layers of rock,...Ch. 20 - Prob. 7AC Ch. 20 - 8. A mixture of unconsolidated weathered earth...Ch. 20 - 9. Decay-resistant, altered organic material...Ch. 20 - 10. Two minerals that usually remain after...

Ch. 20 - 11. Weathered materials move to lower elevations...Ch. 20 - 12. The slow movement downhill of soil on the...Ch. 20 - 13. The wide, level floor of a valley built by a...Ch. 20 - 14. The deposit at the mouth of a river where...Ch. 20 - 15. Rock fragments frozen in moving glacier ice...Ch. 20 - 16. The agent that has the least ability to...Ch. 20 - Prob. 17AC Ch. 20 - Prob. 18AC Ch. 20 - 19. What is the pH of natural rainwater? a. 5.0...Ch. 20 - 20. Freezing water exerts pressure on the wall...Ch. 20 - 21. Of the following rock weathering events, the...Ch. 20 - 22. Which of the following would have the...Ch. 20 - 23. Broad meanders on a very wide, gently sloping...Ch. 20 - Prob. 24AC Ch. 20 - 25. A likely source of loess is a. rock...Ch. 20 - 26. The landscape in a dry climate tends to be...Ch. 20 - 27. Peneplains and monadnocks are prevented from...Ch. 20 - 28. The phrase weathering of rocks means a. able...Ch. 20 - 29. What are you doing to a rock if you pick up...Ch. 20 - 30. What are you doing to the fragments of a...Ch. 20 - 31. What are you doing to a rock if you dissolve...Ch. 20 - Prob. 32AC Ch. 20 - 33. The soil called loam is a. all sand and...Ch. 20 - 34. A moraine is a a. wind deposit. b. glacier...Ch. 20 - 35. The breaking up, crumbling, chemical...Ch. 20 - 36. Crushing of rock at a quarry to make...Ch. 20 - 37. Fragments of rocks fall into a mountain...Ch. 20 - 38. Tree roots grow and expand, and eventually...Ch. 20 - 39. Damage to the Lincoln Memorial by rain and...Ch. 20 - 40. Ferromagnesian minerals will react with...Ch. 20 - 41. You are planning a garden and need a soil...Ch. 20 - Prob. 42AC Ch. 20 - 43. The most extensive glaciers in the United...Ch. 20 - 44. Continental glaciers are found...Ch. 20 - 45. An example of a chemical weathering process...Ch. 20 - Prob. 1QFT Ch. 20 - 2. Granite is the most common rock found on...Ch. 20 - 3. What other erosion processes are important as...Ch. 20 - 4. Describe three ways in which a river erodes...Ch. 20 - Prob. 5QFT Ch. 20 - Prob. 6QFT Ch. 20 - 7. What is a glacier? How does a glacier erode...Ch. 20 - 8. What is rock flour and how is it produced? Ch. 20 - 9. Could a glacier erode the land lower than sea...Ch. 20 - 10. Explain why glacial erosion produces a...Ch. 20 - Prob. 11QFT Ch. 20 - Prob. 12QFT Ch. 20 - 13. What essential condition must be met before...Ch. 20 - 14. Compare the features caused by stream...Ch. 20 - 15. Compare the materials deposited by streams,...Ch. 20 - 16. Why do certain stone buildings tend to...Ch. 20 - Prob. 17QFT Ch. 20 - 18. Discuss all the reasons you can in favor of...Ch. 20 - Prob. 1FFA Ch. 20 - 2. Speculate whether the continents will ever be...Ch. 20 - Prob. 3FFA Ch. 20 - Prob. 1PEA Ch. 20 - Prob. 2PEA Ch. 20 - Prob. 3PEA Ch. 20 - Prob. 4PEA Ch. 20 - Prob. 5PEA Ch. 20 - Prob. 6PEA Ch. 20 - Prob. 7PEA Ch. 20 - Prob. 8PEA Ch. 20 - Prob. 9PEA Ch. 20 - Prob. 10PEA Ch. 20 - Prob. 11PEA Ch. 20 - Prob. 12PEA Ch. 20 - Prob. 13PEA Ch. 20 - Prob. 14PEA Ch. 20 - Prob. 15PEA Ch. 20 - Prob. 1PEB Ch. 20 - 2. The average rate of chemical weathering of...Ch. 20 - 3. A slope is creeping at a rate of 1.2 mm/yr. A...Ch. 20 - Prob. 4PEB Ch. 20 - Prob. 5PEB Ch. 20 - Prob. 6PEB Ch. 20 - 7. The elevation of a streambed is surveyed near...Ch. 20 - 8. Each year, sheet erosion removes 0.9 mm of...Ch. 20 - Prob. 9PEB Ch. 20 - Prob. 10PEB Ch. 20 - 11. The discharge (Q) of a stream is the velocity...Ch. 20 - 12. What is the velocity (v) of a stream with a...Ch. 20 - Prob. 13PEB Ch. 20 - 14. A 1998 survey of glacial end moraines...Ch. 20 - 15. Rates of tectonic uplift can be determined...

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