College Physics: Explore And Apply, Volume 2 (2nd Edition)

2nd Edition

ISBN: 9780134862910

Author: Eugenia Etkina, Gorazd Planinsic, Alan Van Heuvelen, Gorzad Planinsic

Publisher: PEARSON

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Textbook Question

Chapter 7, Problem 2MCQ

Which answer best represents the system’s change in energy for the following process? The system includes Earth, two carts, and a compressed spring between the carts. The spring is released, and in the final state, one cart is moving up a frictionless ramp until it stops. The other cart is moving in the opposite direction on a horizontal frictionless track.

Kinetic energy to gravitational potential energy

Elastic potential energy to gravitational potential energy

Elastic potential energy to kinetic energy and gravitational potential energy

Elastic potential energy to kinetic energy

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Chapter 7, Problem 1MCQ

Chapter 7, Problem 3MCQ

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What is the current, in amps, across a conductor that has a resistance of10 Ω and a voltage of 20 V? 2. A conductor draws a current of 100 A and a resistance of 5 Ω. What is thevoltageacross the conductor? 3. What is the resistance, in ohm’s, of a conductor that has a voltage of 80 kVand acurrent of 200 mA? 4. An x-ray imaging system that draws a current of 90 A is supplied with 220V. What is the power consumed? 5. An x-ray is produced using 800 mA and 100 kV. What is the powerconsumed in kilowatts?

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Chapter 7 Solutions

College Physics: Explore And Apply, Volume 2 (2nd Edition)

Ch. 7 - 2. Which answer best represents the system’s...Ch. 7 - An Atwood machine is shown in Figure Q7.3. As the...Ch. 7 - Prob. 4MCQ Ch. 7 - 5. Three processes are described below. Choose one...Ch. 7 - 6. Choose which statement describes a process in...Ch. 7 - 7. Which example(s) below involve(s) zero physics...Ch. 7 - 8. Estimate the change in gravitational potential...Ch. 7 - What does it mean if object 1 does +10 J of work...Ch. 7 - You pull on a spring, which obeys Hookes law, in...Ch. 7 - The graph in Figure Q7.11 shows the time...Ch. 7 - 12. A 1400-kg car is traveling on a level road at...Ch. 7 - Prob. 13MCQ Ch. 7 - Two clay balls are moving toward each other. The...Ch. 7 - 15. Is energy a physical phenomenon, a model, or a...Ch. 7 - 16. Your friend thinks that the escape speed...Ch. 7 - Suggest how you can measure the following...Ch. 7 - How can satellites stay in orbit without any jet...Ch. 7 - Why does the Moon have no atmosphere, but Earth...Ch. 7 - What will happen to Earth if our Sun becomes a...Ch. 7 - 21. In the equation , the gravitational potential...Ch. 7 - 22. You push a small cart by exerting a constant...Ch. 7 - 1. Jay fills a wagon with sand (about 20 kg) and...Ch. 7 - 2. You have a 15-kg suitcase and (a) slowly lift...Ch. 7 - * You use a rope to slowly pull a sled and its...Ch. 7 - A rope attached to a truck pulls a 180-kg...Ch. 7 - 5. You lift a 25-kg child 0.80 m, slowly carry him...Ch. 7 - A truck runs into a pile of sand, moving 0.80 m as...Ch. 7 - 7. A 0.50-kg block is placed in a straight gutter...Ch. 7 - s up a smooth incline, which makes an angle with...Ch. 7 - 9. ** It is a windy day. You are moving a 20-kg...Ch. 7 - A 5.0-kg rabbit and a 12-kg Irish setter have the...Ch. 7 - Prob. 11P Ch. 7 - * A pickup truck (2268 kg) and a compact car (1100...Ch. 7 - * When does the kinetic energy of a car change...Ch. 7 - * When exiting the highway, a 1100-kg car is...Ch. 7 - Prob. 15P Ch. 7 - 16. * Flea jump flea pushes off a surface by...Ch. 7 - * Roller coaster ride A roller coaster car drops a...Ch. 7 - 18. * BIO EST Heart pumps blood The heart does...Ch. 7 - 19. * Wind energy Air circulates across Earth in...Ch. 7 - 20. * BIO Bone break The tibia bone in the lower...Ch. 7 - 21. * BIO EST Climbing Mt. Everest In 1953 Sir...Ch. 7 - 22. A door spring is difficult to stretch. (a)...Ch. 7 - * A moving car has 40,000 J of kinetic energy...Ch. 7 - 24. * The force required to stretch a slingshot by...Ch. 7 - Jim is driving a 2268-kg pickup truck at 20 m/s...Ch. 7 - 26. * A car skids 18 m on a level road while...Ch. 7 - s mass is m. An average friction force of...Ch. 7 - Prob. 28P Ch. 7 - Prob. 29P Ch. 7 - 30. In a popular new hockey game, the players use...Ch. 7 - 31. The top of a descending ski slope is 50 m...Ch. 7 - * If 20% of the gravitational potential energy...Ch. 7 - Prob. 33P Ch. 7 - 34. A driver loses control of a car, drives off an...Ch. 7 - * You are pulling a box so it moves at increasing...Ch. 7 - s speed increases from zero to 4.0 m/s in a...Ch. 7 - 37. ** EST Hit by a hailstone A 0.030-kg hailstone...Ch. 7 - 38. * BIO Froghopper jump Froghoppers may be the...Ch. 7 - 39. * Bar chart Jeopardy 1 Describe in words and...Ch. 7 - * Bar chart Jeopardy 2 Describe in words and with...Ch. 7 - 41. * Equation Jeopardy 1 Construct a qualitative...Ch. 7 - * Equation Jeopardy 2 Construct a qualitative...Ch. 7 - Prob. 43P Ch. 7 - 44. * Evaluation 2 Your friend provides a solution...Ch. 7 - 45. A crab climbs up a vertical rock with a...Ch. 7 - 46 * Work-energy bar charts for a person going...Ch. 7 - Prob. 47P Ch. 7 - * A 1060-kg car moving west at 16 m/s collides...Ch. 7 - * You fire an 80-g arrow so that it is moving at...Ch. 7 - 50. * You fire a 50-g arrow that moves at an...Ch. 7 - * To confirm the results of Problem 7.50, you try...Ch. 7 - 52. * Somebody tells you that Figure P7.52 shows...Ch. 7 - 54. A roofing shingle elevator is lifting a...Ch. 7 - 55. (a) What is the power involved in lifting a...Ch. 7 - * A fire engine must lift 30 kg of water a...Ch. 7 - * BIO Internal energy change while biking You set...Ch. 7 - * Climbing Mt. Mitchell An 82-kg hiker climbs to...Ch. 7 - * BIO EST Sears stair climb The fastest time for...Ch. 7 - * BIO EST Exercising so you can eat ice cream You...Ch. 7 - 61. ** BIO Salmon move upstream In the past,...Ch. 7 - * EST Estimate the maximum horsepower of the...Ch. 7 - Prob. 63P Ch. 7 - At what distance from Earth is the gravitational...Ch. 7 - 65. * Possible escape of different air molecule...Ch. 7 - Determine the escape speed for a rocket to leave...Ch. 7 - Determine the escape speed for an object to leave...Ch. 7 - If the Sun were to become a black hole, how much...Ch. 7 - * A satellite moves in elliptical orbit around...Ch. 7 - 70. * Determine the maximum radius Earth's Moon...Ch. 7 - 71. You throw a clay ball vertically upward. The...Ch. 7 - Prob. 72GP Ch. 7 - Prob. 73GP Ch. 7 - 74 * EST A “gravity force car” is powered by the...Ch. 7 - * Loop the loop You are given a loop raceway for...Ch. 7 - 76. ** Atwood machine Two blocks of masses hang...Ch. 7 - andm2 are connected with a string that passes over...Ch. 7 - of all species became extinct, ending the reign of...Ch. 7 - s cradle is a toy that consists of several metal...Ch. 7 - 81. ** Six Flags roller coaster A loop-the-loop on...Ch. 7 - ** Designing a ride You are asked to help design a...Ch. 7 - BIO Metabolic rate Energy for our activities is...Ch. 7 - BIO Metabolic rate Energy for our activities is...Ch. 7 - BIO Metabolic rate Energy for our activities is...Ch. 7 - BIO Metabolic rate Energy for our activities is...Ch. 7 - BIO Metabolic rate Energy for our activities is...Ch. 7 - BIO Kangaroo hopping Hopping is an efficient...Ch. 7 - BIO Kangaroo hopping Hopping is an efficient...Ch. 7 - BIO Kangaroo hopping Hopping is an efficient...Ch. 7 - BIO Kangaroo hopping Hopping is an efficient...Ch. 7 - BIO Kangaroo hopping Hopping is an efficient...Ch. 7 - BIO Kangaroo hopping Hopping is an efficient...

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