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## ISCI 101 Week 2 Notes

by: Charles Miller

68

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2

# ISCI 101 Week 2 Notes ISCI 101

Marketplace > James Madison University > Science > ISCI 101 > ISCI 101 Week 2 Notes
Charles Miller
JMU
GPA 3.67

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## About this Document

These notes cover the materials covered in the second week in class
COURSE
Physics, Chemistry, and the Human Experience
PROF.
Tom Devore
TYPE
Class Notes
PAGES
2
WORDS
CONCEPTS
EARTH, Life Science
KARMA
25 ?

## Popular in Science

This 2 page Class Notes was uploaded by Charles Miller on Sunday September 4, 2016. The Class Notes belongs to ISCI 101 at James Madison University taught by Tom Devore in Fall 2016. Since its upload, it has received 68 views. For similar materials see Physics, Chemistry, and the Human Experience in Science at James Madison University.

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Date Created: 09/04/16
ISCI 101 Week 2 Sources of Energy: The Sun Earth’s Energy Balance  Absorbed Sunlight= Emitted Infrared Radiation  o If E in= E out then the earth has a constant temperature   The Sun is not always producing a constant energy Types of Energy  Kinetic energy= 1/2mv^2   Gravitational Potential Energy= mgh Other Forms of Energy  Thermal Energy  Chemical Energy  Electric Energy  Radiant Energy\  Nuclear Energy  Magnetic Energy  Elastic Energy  Sound Energy  Mechanical Energy  Luminous Energy  Mass (E=mc^2) The Law of Conservation of Energy Energy can be converted,but not created or destroyed  Galileo­ 1638, created the interrupted pendulum, converted potential energy to kinetic  energy and back again.  o He discovered this in an attempt to improve the timekeeping technology of the  era.  Benjamin Thompson­ 1798, He observed heat generation during the boring of cannons  and helped to establish the theory that mechanical motion could be converted into heat,  and the conversion was quantitative and could be predicted.   Von Mayer­ discovered that heat and mechanical work were both forms of energy and in 1845 published a monograph that stated a quantitative relationship between them.   James Prescott Joule­ 1843, discovered the mechanical equivalent in a series of  experiments. In the most famous , he showed that gravitational potential energy lost by  the weight in descending was equal to the thermal energy gained by friction produced by the water and the paddle.  The total amount of energy in an isolated system is said to be conserved over time.  Energy can change its location within the system, ( chemical energy can become kinetic  energy), but that energy can neither be created nor destroyed. The Sun  Oil,coal,and gas are primarily stored sources of solar energy  Properties of the Sun o Mass­ 2x10^30 Kg (330,000 earth masses) o Radius­ 7x10^8 m (109 earth radii) o Age 4.6x10^8 years o It is composed of 75% Hydrogen and 25% Helium o Power Output­ 3.9x10^26 watts o The output of the Sun is not constant and changes over time Light  Visible light is electromagnetic radiation that is visible to the human eye, and is  responsible for the sense of sight. Visible light has a wavelength from between 380mm  to 740mm. Invisible infrared light has a longer wavelength and invisible ultraviolet light  has a shorter wavelength.  o Primary properties of visual light are intensity, frequency, propagation direction  and wavelength spectrum.  Light waves are called transverse waves and sound waves are called longitudinal waves

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