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Rub your hands together vigorously. What happens Discuss

Physics: Principles with Applications | 6th Edition | ISBN: 9780130606204 | Authors: Douglas C. Giancoli ISBN: 9780130606204 3

Solution for problem 1CQ Chapter 11

Physics: Principles with Applications | 6th Edition

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Physics: Principles with Applications | 6th Edition | ISBN: 9780130606204 | Authors: Douglas C. Giancoli

Physics: Principles with Applications | 6th Edition

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Problem 1CQ

Rub your hands together vigorously. What happens? Discuss the energy transfers and transformations that take place.

Step-by-Step Solution:

Step 1 First, we should list out what all energies will be produced or transformed while rubbing the hands. They are, Kinetic Energy, K (Due to the relative motion of the hands) Gravitational Potential energy, U [It can g represented as “Potential energy” (U). But, it is purely due to gravitational force exerted So, it should be represented as Gravitational Potential Energy] Chemical energy, E (The energy which is spend by the body to move the hands) Ch Thermal energy, E (We feeTht as hot while rubbing the hands). Step 2 Here, we should analyse the possibilities of energy transformations which are mentioned above. 1. Chemical Energy (E ) Ch This energy is from our body and which will be converted to kinetic energy. 2. Kinetic energy (K) The chemical energy in our body will be converted to kinetic energy while rubbing 3. Gravitational potential energy (U ) g There is no change for the position of the hands and the Gravitational potential energy can be considered as zero. (If the change in position is high, then gravitational potential energy will come into the picture.) 4. Thermal energy (E ) Th The kinetic energy of hands generated from chemical energy of our body will be then converted to thermal energy.

Step 3 of 3

Chapter 11, Problem 1CQ is Solved
Textbook: Physics: Principles with Applications
Edition: 6
Author: Douglas C. Giancoli
ISBN: 9780130606204

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Rub your hands together vigorously. What happens Discuss

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