A student evaluates a weight loss program by calculating the number of times he would need to climb a 16.0 m high flight of steps in order to lose one pound (0.45 kg) of fat. Metabolizing 1.00 kg of fat can release 3.77 x 10 J ofchemical energy and the body can convert about 21.8% of this into mechanical energy (the rest goes into internal energy.)HINT(a) How much mechanical energy (in J) can the body produce from 0.450 kg of fat?(b) How many trips up the flight of steps are required for the 66.0 kg student to lose 0.450 kg of fat? Ignore the relatively small amount of energy required to return down the stairs.tripsNeed Help?Read ItWatch It

Given: Total height , h=16.0 m Weight fat lose , m=0.45 kg 1 kg of fat can produce chemical 3.77×107…

Answered: A student evaluates a weight loss…

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter1: Getting Started

Section: Chapter Questions

Problem 48PQ: In 2011, artist Hans-Peter Feldmann covered the walls of a gallery at the New York Guggenheim Museum...

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The total consumption of electrical energy in the United States is about 1.0 1019 joules per year. What is the average rate of electrical energy consumption in watts? If the population of the United States is 300 million, what is the average rate of electrical energy consumption per person? The sun transfers energy to the earth by radiation at a rate of approximately 1.0 kW per square meter of surface. If this energy could be collected and converted to electrical energy with 40 % efficiency, how great an area (in square kilometers) would be required to collect the electrical energy used by the United States?
The metabolic power for walking is 316 W for Lili. For how long would Lili have to walk to use all the energy available in a can of soda, which energy content is 628 kJ (150 food calorie), in minutes? Your answer needs to have 3 significant figures, including the negative sign in your answer if needed. Do not include the positive sign if the answer is positive. No unit is needed in your answer, it is already given in the question statement.
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)?
A student evaluates a weight loss program by calculating the number of times she would need to climb a 13.0 m high flight of steps in order to lose one pound (0.45 kg) of fat. Metabolizing 1.00 kg of fat can release 3.77 x 10'J of chemical energy and the body can convert about 21.8% of this into mechanical energy (the rest goes into internal energy.) HINT (a) How much mechanical energy (in J) can the body produce from 0.450 kg of fat? (b) How many trips up the flight of steps are required for the 70.0 kg student to lose 0.450 kg of fat? Ignore the relatively small amount of energy required to return down the stairs. trips
I'm trying to solve this question, The record time for a Tour de France cyclist to ascend the 1100-mm-high Alpe d'Huez is 37.5 minmin. The rider and his bike had a mass of 65 kgkg. At the average speed of the ride, the metabolic power to ride on level ground would be 700 WW. To this, we must add the power to make the climb. What was his total metabolic power? I arrived at 1125W, but the answer is not right. How do I need to approach this problem?
A student evaluates a weight loss program by calculating the number of times she would need to climb a 10.0 m high flight of steps in order to lose one pound (0.45 kg) of fat. Metabolizing 1.00 kg of fat can release 3.77 x 10'J of chemical energy and the body can convert about 21.2% of this into mechanical energy (the rest goes into internal energy.) HINT (a) How much mechanical energy (in J) can the body produce from 0.450 kg of fat? (b) How many trips up the flight of steps are required for the 52.0 kg student to lose 0.450 kg of fat? Ignore the relatively small amount of energy required to return down the stairs. trips Need Help? Read It Watch It
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You use a quantity of fuel with a total energy content of 19.02 MJ to power an engine. If the average output of the engine over 2 hours was 2.12 kW, what is the efficiency of the engine?
3 Kleiber's Law states that for the vast majority of animals, the metabolic rate M is a power function of the weight W, and the power is k = .t 4 (a) The Eastern gray squirrel weighs about 1 pound. How does the squirrel's metabolic rate compare with that of a 200-pound man? (Round your answer to two decimal places.) The man's metabolic rate is times that of the squirrel. (b) How does a 200-pound man's metabolic rate compare with that of a 120-pound woman? (Round your answer to two decimal places.) The man's metabolic rate is times that of the woman. (c) Based on your answer to part (b), would overeating (the same amount for each) be more likely to lead to weight gain for the man or for the woman? Overeating would be more likely to lead to weight gain for the man. Overeating would be more likely to lead to weight gain for the woman.
As a gasoline engine is running, an amount of gasoline containing 15,200 J of chemical potential energy is burned in 1 s. During that second, the engine does 3,800 J of work. (a) What is the engine's efficiency (in percent)? (b) The burning gasoline has a temperature of about 5,000°F (3,000 K). The waste heat from the engine flows into air at about 86°F (303 K). What is the Carnot efficiency (in percent) of a heat engine operating between these two temperatures?
A bucket holding 17kg of sand is being lifted by a weightless rope. The bucket leaks 0.5kg of sand for every 1m lifted. Find the work done to lift the bucket up by 10m. Let X represent the distance lifted so far, and use dx to represent a small distance of additional lifting. Assume acceleration due to gravity is g=9.8m/s^2. Give the answer in Joules
For exercise, an athlete lifts a barbell that weighs 400 N from the ground to a height of 2.20 m at a constant speed in a time of 1.60 s. How much thermal energy is created in this process, in kJ (kiloJoule)?

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