College Physics
College Physics
11th Edition
ISBN: 9781305952300
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
bartleby

Concept explainers

Question
Book Icon
Chapter 11, Problem 4P

(a)

To determine

The amount of joules of energy that are equivalent of one jelly doughnut.

(b)

To determine

The number of stairs climbed to convert the food energy to equivalent mechanical energy.

(c)

To determine

The number of stairs climbed to convert the food energy to equivalent mechanical energy if the body is 25% efficient.

Blurred answer
Students have asked these similar questions
A 46-kg woman eats a 522 Calorie (522 kcal) jelly doughnut for breakfast. (a) How many joules of energy are the equivalent of one jelly doughnut? 2192.4 X Your response is off by a multiple of ten. J (b) How many steps must the woman climb on a very tall stairway to change the gravitational potential energy of the woman-Earth system by a value equivalent to the food energy in one jelly doughnut? Assume the height of a single stair is 15 cm. 8.67 X Your response differs significantly from the correct answer. Rework your solution from the beginning and check each step carefully. stairs (c) If the human body is only 26% efficient in converting chemical potential energy to mechanical energy, how many steps must the woman climb to work off her breakfast? 9 X Your response differs significantly from the correct answer. Rework your solution from the beginning and check each step carefully. stairs
A 55-kg woman cheats on her diet and eats a 540-Calorie (540 kcal) jelly doughnut for breakfast. (a) How many joules of energy are the equivalent of woman climb to perform an amount of mechanical work equivalent to the food energy in one jelly doughnut? Assume the height of a single stair is 15 cm. (c) If the human body is only 25% efficient in converting chemical energy to mechanical energy, how many stairs must the woman climb to work offher breakfast?
A food calorie is a unit of energy such that 1 food calorie = 4184 J. This means that a person that burns energy with a power of 4184 W would burn one food calorie every second. A more typical human power rate is 90 W (called the basal metabolic rate). At this rate, how many calories are burned per second (or alternatively, how many seconds does it take to burn 1 calorie)?

Chapter 11 Solutions

College Physics

Ch. 11 - Prob. 6CQCh. 11 - Cups of water for coffee or tea can be warmed with...Ch. 11 - The U.S. penny is now made of copper-coated zinc....Ch. 11 - A tile floor may feel uncomfortably cold to your...Ch. 11 - In a calorimetry experiment, three samples A, B,...Ch. 11 - Figure CQ11.11 shows a composite bar made of three...Ch. 11 - Objects A and B have the same size and shape with...Ch. 11 - A poker is a stiff, nonflammable rod used to push...Ch. 11 - On a very hot day, its possible to cook an egg on...Ch. 11 - Prob. 15CQCh. 11 - Star A has twice the radius and twice the absolute...Ch. 11 - Convert 3.50 103 cal to the equivalent number of...Ch. 11 - Prob. 2PCh. 11 - A 75-kg sprinter accelerates from rest to a speed...Ch. 11 - Prob. 4PCh. 11 - A persons basal metabolic rate (BMR) is the rate...Ch. 11 - The temperature of a silver bar rises by 10.0C...Ch. 11 - The highest recorded waterfall in the world is...Ch. 11 - An aluminum rod is 20.0 cm long at 20.0C and has a...Ch. 11 - Lake Erie contains roughly 4.00 1011 m3 of water....Ch. 11 - A 3.00-g copper coin at 25.0C drops 50.0 m to the...Ch. 11 - Prob. 11PCh. 11 - Prob. 12PCh. 11 - Prob. 13PCh. 11 - A 1.5-kg copper block is given an initial speed of...Ch. 11 - Prob. 15PCh. 11 - Prob. 16PCh. 11 - What mass of water at 25.0C must be allowed to...Ch. 11 - Lead pellets, each of mass 1.00 g, are heated to...Ch. 11 - Prob. 19PCh. 11 - A large room in a house holds 975 kg of dry air at...Ch. 11 - Prob. 21PCh. 11 - A 1.50-kg iron horseshoe initially at 600C is...Ch. 11 - A student drops two metallic objects into a 120-g...Ch. 11 - When a driver brakes an automobile, the friction...Ch. 11 - A Styrofoam cup holds 0.275 kg of water at 25.0C....Ch. 11 - Prob. 26PCh. 11 - Prob. 27PCh. 11 - How much thermal energy is required to boil 2.00...Ch. 11 - A 75-g ice cube al 0C is placed in 825 g of water...Ch. 11 - Prob. 30PCh. 11 - Prob. 31PCh. 11 - Prob. 32PCh. 11 - Prob. 33PCh. 11 - Prob. 34PCh. 11 - Prob. 35PCh. 11 - Prob. 36PCh. 11 - A high-end gas stove usually has at least one...Ch. 11 - Prob. 38PCh. 11 - Steam at 100.C is added to ice at 0C. (a) Find the...Ch. 11 - The excess internal energy of metabolism is...Ch. 11 - A 3.00-g lead bullet at 30.0C is fired at a speed...Ch. 11 - A glass windowpane in a home is 0.62 cm thick and...Ch. 11 - A pond with a flat bottom has a surface area of...Ch. 11 - The thermal conductivities of human tissues vary...Ch. 11 - A steam pipe is covered with 1.50-cm-thick...Ch. 11 - The average thermal conductivity of the walls...Ch. 11 - Consider two cooking pots of the same dimensions,...Ch. 11 - A thermopane window consists of two glass panes,...Ch. 11 - A copper rod and an aluminum rod of equal diameter...Ch. 11 - A Styrofoam box has a surface area of 0.80 m and a...Ch. 11 - A rectangular glass window pane on a house has a...Ch. 11 - A granite ball of radius 2.00 m and emissivity...Ch. 11 - Measurements on two stars indicate that Star X has...Ch. 11 - The filament of a 75-W light bulb is at a...Ch. 11 - The bottom of a copper kettle has a 10.0-cm radius...Ch. 11 - A family comes home from a long vacation with...Ch. 11 - A 0.040.-kg ice cube floats in 0.200 kg of water...Ch. 11 - The surface area of an unclothed person is 1.50...Ch. 11 - A student measures the following data in a...Ch. 11 - Prob. 60APCh. 11 - A class of 10 students; taking an exam has a power...Ch. 11 - A class of 10 students taking an exam has a power...Ch. 11 - A bar of gold (Au) is in thermal contact with a...Ch. 11 - An iron plate is held against an iron, wheel so...Ch. 11 - Prob. 65APCh. 11 - Three liquids are at temperatures of 10C, 20C, and...Ch. 11 - Earths surface absorbs an average of about 960....Ch. 11 - A wood stove is used to heat a single room. The...Ch. 11 - Prob. 69APCh. 11 - Prob. 70APCh. 11 - The surface of the Sun has a temperature of about...Ch. 11 - The evaporation of perspiration is the primary...Ch. 11 - Prob. 73APCh. 11 - An ice-cube tray is filled with 75.0 g of water....Ch. 11 - An aluminum rod and an iron rod are joined end to...
Knowledge Booster
Background pattern image
Physics
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
SEE MORE QUESTIONS
Recommended textbooks for you
  • Text book image
    College Physics
    Physics
    ISBN:9781285737027
    Author:Raymond A. Serway, Chris Vuille
    Publisher:Cengage Learning
    Text book image
    College Physics
    Physics
    ISBN:9781938168000
    Author:Paul Peter Urone, Roger Hinrichs
    Publisher:OpenStax College
Text book image
College Physics
Physics
ISBN:9781285737027
Author:Raymond A. Serway, Chris Vuille
Publisher:Cengage Learning
Text book image
College Physics
Physics
ISBN:9781938168000
Author:Paul Peter Urone, Roger Hinrichs
Publisher:OpenStax College