COLLEGE PHYSICS WITH ACCESS CODE
4th Edition
ISBN: 9780135160152
Author: Knight
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Textbook Question
Chapter 11, Problem 7CQ
For most automobiles, the number of miles per gallon decreases as highway speed increases. Fuel economy drops as speeds increase from 55 to 65 mph, then decreases further as speeds increase to 75 mph. Explain why this is the case.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
How many slices of pizza must you eat to walk for 1.0 h at a speed of 5.0 km/h? (Assume your mass is 68 kg.)
During the isobaric transformation of gas, the temperature decreased 4 times. What is the ratio of the initial to final volume of the gas?
A 42 client with a body mass of 74 kg is interested in jogging on the treadmill as their primary means of exercise, while they listen to their "pump-up" music playlist that lasts exactly 28 minutes. To be sure they get the recommended volume of exercise each week, you'd like to have your client burn 350 kcal in each jogging session. To achieve this, what should your client set as the treadmill speed while running, in miles per hour?
Chapter 11 Solutions
COLLEGE PHYSICS WITH ACCESS CODE
Ch. 11 - Rub your hands together vigorously. What happens?...Ch. 11 - Describe the energy transfers and transformations...Ch. 11 - According to Table 11.4, cycling at 15 km/h...Ch. 11 - Prob. 4CQCh. 11 - Prob. 5CQCh. 11 - For most automobiles, the number of miles per...Ch. 11 - Prob. 8CQCh. 11 - Prob. 9CQCh. 11 - Prob. 10CQCh. 11 - Prob. 11CQ
Ch. 11 - Prob. 12CQCh. 11 - For Questions 12 through 17, give a specific...Ch. 11 - For Questions 12 through 17, give a specific...Ch. 11 - For Questions 12 through 17, give a specific...Ch. 11 - For Questions 12 through 17, give a specific...Ch. 11 - For Questions 12 through 17, give a specific...Ch. 11 - For Questions 12 through 17, give a specific...Ch. 11 - Prob. 19CQCh. 11 - Prob. 20CQCh. 11 - Prob. 21CQCh. 11 - Prob. 22CQCh. 11 - Prob. 24CQCh. 11 - Prob. 25CQCh. 11 - Electric vehicles increase speed by using an...Ch. 11 - When the suns light hits the earth, the...Ch. 11 - Prob. 29CQCh. 11 - Prob. 30CQCh. 11 - Prob. 31CQCh. 11 - Prob. 32MCQCh. 11 - Prob. 33MCQCh. 11 - A person is walking on level ground at constant...Ch. 11 - A person walks 1 km, turns around, and runs back...Ch. 11 - 200 J of heat is added to two gases, each in a...Ch. 11 - Prob. 37MCQCh. 11 - A refrigerators freezer compartment is set at 10C;...Ch. 11 - A 10% efficient engine accelerates a 1500 kg car...Ch. 11 - Prob. 2PCh. 11 - A typical photovoltaic cell delivers 4.0 103 W of...Ch. 11 - Prob. 4PCh. 11 - Prob. 5PCh. 11 - Prob. 6PCh. 11 - In an average human, basic life processes require...Ch. 11 - Prob. 8PCh. 11 - An energy bar contains 22 g of carbohydrates. How...Ch. 11 - Prob. 10PCh. 11 - Prob. 11PCh. 11 - Prob. 12PCh. 11 - An energy bar contains 22 g of carbohydrates. If...Ch. 11 - Prob. 14PCh. 11 - Prob. 15PCh. 11 - Prob. 16PCh. 11 - The label on a candy bar says 400 Calories....Ch. 11 - Prob. 18PCh. 11 - A weightlifter curls a 30 kg bar, raising it each...Ch. 11 - Prob. 20PCh. 11 - Prob. 21PCh. 11 - Prob. 22PCh. 11 - Suppose your body was able to use the chemical...Ch. 11 - Prob. 24PCh. 11 - Prob. 25PCh. 11 - Prob. 26PCh. 11 - Prob. 27PCh. 11 - The planet Mercurys surface temperature varies...Ch. 11 - A piece of metal at 100C has its Celsius...Ch. 11 - Prob. 30PCh. 11 - 500 J of work are done on a system in a process...Ch. 11 - Prob. 32PCh. 11 - 600 J of heat energy are transferred to a system...Ch. 11 - 10 J of heat are removed from a gas sample while...Ch. 11 - A heat engine extracts 55 kJ from the hot...Ch. 11 - A heat engine does 20 J of work while exhausting...Ch. 11 - A power plant running at 35% efficiency generates...Ch. 11 - A heat engine operating between energy reservoirs...Ch. 11 - A newly proposed device for generating electricity...Ch. 11 - Prob. 41PCh. 11 - Prob. 42PCh. 11 - Prob. 43PCh. 11 - Prob. 44PCh. 11 - A refrigerator takes in 20 J of work and exhausts...Ch. 11 - Air conditioners are rated by their coefficient of...Ch. 11 - 50 J of work are done on a refrigerator with a...Ch. 11 - Prob. 48PCh. 11 - Find the maximum possible coefficient of...Ch. 11 - Prob. 50PCh. 11 - Prob. 51PCh. 11 - Prob. 52PCh. 11 - Prob. 53PCh. 11 - Prob. 55GPCh. 11 - Prob. 56GPCh. 11 - The record time for a Tour de France cyclist to...Ch. 11 - Championship swimmers take about 22 s and about 30...Ch. 11 - A 68 kg hiker walks at 5.0 km/h up a 7% slope....Ch. 11 - To make your workouts more productive, you can get...Ch. 11 - The resistance of an exercise bike is often...Ch. 11 - Prob. 62GPCh. 11 - Prob. 63GPCh. 11 - An engine does 10 J of work and exhausts 15 J of...Ch. 11 - An engine operating at maximum theoretical...Ch. 11 - An engineer claims to have measured the...Ch. 11 - A typical coal-fired power plant burns 300 metric...Ch. 11 - Prob. 68GPCh. 11 - Air conditioners sold in the United States are...Ch. 11 - The surface waters of tropical oceans are at a...Ch. 11 - The light energy that falls on a square meter of...Ch. 11 - Prob. 72MSPPCh. 11 - Prob. 73MSPPCh. 11 - Prob. 74MSPPCh. 11 - Prob. 75MSPPCh. 11 - Prob. 76MSPPCh. 11 - Prob. 77MSPPCh. 11 - Prob. 78MSPPCh. 11 - Prob. 79MSPP
Additional Science Textbook Solutions
Find more solutions based on key concepts
What intensity level does the sound in the preceding problem correspond to?
University Physics Volume 1
We find rocks on Mars showing clearly that the planet once had a global magnetic field nearly as strong as Eart...
Life in the Universe (4th Edition)
How much rope tension holds a 20-N bag of apples at rest?
Conceptual Integrated Science
Q27.13 A student claims that if lightning strikes a metal flag-pole, the force exerted by the earth’s magnetic ...
University Physics with Modern Physics (14th Edition)
Unreasonable Results The 335 kV AC electricity from a power transmission line is fed into the primary coil of a...
College Physics
Does it ever make sense to say that one object is twice as hot as another? Does it matter whether one is referr...
An Introduction to Thermal Physics
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.Similar questions
- You have considerable intuition about whether some process increases or decreases the entropy of the Universe. Just imagine watching the process in reverse. If it doesnt make sense in reverse, entropy must have increased. This test isnt always foolproof: some process may seem reversible, but the entropy of the Universe still increases. Use your intuition to decide whether the entropy of the Universe increases during the following processes: a. A car crashes into a brick wall. b. An ice cube floating in a large cup of water melts. c. A puddle of water freezes to ice slowly. d. The frozen puddle of water melts slowly.arrow_forwardWhat percent of the time will you get something in the range from 60 heads and 40 tails through 40 heads and 60 tails when tossing 100 coins? The total number of microstates in that range is 1.221030 . (Consult Table 15.4.)arrow_forwardCalculate the increase in entropy of the Universe when you add 20.0 g of 5.00C cream to 200 g of 60.0C coffee. Assume that the specific heats of cream and coffee are both 4.20J/g C.arrow_forward
- Every so often, someone claims to have built a machine that can generate energy perpetually from nothing. Why isn't this possible according to the known laws of nature? Why do you think claims of perpetual motion machines sometimes receive substantial media attention?arrow_forwardA runner can burn as many as 3,000 calories while running a marathon. Estimate the change in the mass of the runner due to this energy loss. Neglect other methods of mass loss. [1 cal = 4184 J]arrow_forwardHow many sprints from rest to a speed of 5.0 m/s would a 65-kg man have to complete to burn off 5.0 x 10^2 Calories? (Assume 100% efficiency in converting food energy to mechanical energy.)arrow_forward
- The initial volume of the cylinder was 1 liter at 50 C and the mass on the top is 1kg. What will be the new volume V at T =100*^ C and the mass on top of the cylinder is changed from 2kg. Solve this problem using PV / T = constantarrow_forwardFollowing vigorous exercise, the body temperature of a 70.0 kg person is 39.3°C . At what rate in watts must the person transfer thermal energy to reduce the the body temperature to 37.0°C in 40.0 min, assuming the body continues to produce energy at the rate of 150 W?(1 watt = 1 joule/second or 1 W = 1 J/s). Answer _______________________ W (NO scientific notation ONLY Real Number)arrow_forwardIt is observed that the density of an ideal gas increases by 10 percent when compressed isothermally from 10 atm to 11 atm. Determine the percent increase in the density of the gas if it is compressed isothermally from 997 atm to 1008 atm. The increase in the density of the gas is _______ %.arrow_forward
- From the table below which shows the metabolic rate for each activity, if a person with height 1.50m and weight of 60kg completed all these activities in one day. Calculate the person's one day energy expenditure. Activity8hr sleeping (35 Cal/m^2 -hr)8hr moderate physical labor (150 Cal/m^2 -hr)4hr reading, writing, TV watching (60 Cal/m^2 -hr)1hr heavy exercise (300 Cal/m^2 -hr)1hr dressing, eating (100 Cal/m^2 -hr)arrow_forwardAn energetic athlete can use up all the energy from a diet of 4000 Cal/day. If he were to use up this energy at a steady rate, what is the ratio of the rate of energy use compared to that of a 100 W bulb? (The power of 100 W is the rate at which the bulb converts electrical energy to heat and the energy of visible light.)arrow_forwardWhich does NOT describe the entropy of the universe after a process has occurred? a. Increases b. may not change c. does not decrease d. decreasesarrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Physics for Scientists and Engineers, Technology ...PhysicsISBN:9781305116399Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning
College PhysicsPhysicsISBN:9781938168000Author:Paul Peter Urone, Roger HinrichsPublisher:OpenStax College
Physics for Scientists and Engineers: Foundations...PhysicsISBN:9781133939146Author:Katz, Debora M.Publisher:Cengage Learning
Principles of Physics: A Calculus-Based TextPhysicsISBN:9781133104261Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning
Physics for Scientists and Engineers, Technology ...
Physics
ISBN:9781305116399
Author:Raymond A. Serway, John W. Jewett
Publisher:Cengage Learning
College Physics
Physics
ISBN:9781938168000
Author:Paul Peter Urone, Roger Hinrichs
Publisher:OpenStax College
Physics for Scientists and Engineers: Foundations...
Physics
ISBN:9781133939146
Author:Katz, Debora M.
Publisher:Cengage Learning
Principles of Physics: A Calculus-Based Text
Physics
ISBN:9781133104261
Author:Raymond A. Serway, John W. Jewett
Publisher:Cengage Learning
Heat Transfer: Crash Course Engineering #14; Author: CrashCourse;https://www.youtube.com/watch?v=YK7G6l_K6sA;License: Standard YouTube License, CC-BY