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Sunday, November 14, 2010

Homework 9 part 1

1. Kelvin, Celsius, and Fahrenheit (not the Taiwanese boy band)
2. The more thermal energy that something gives off, the more heat is felt, and the more the temperature is.
3. Specific heat is the amount of heat per unit of mass needed to make the temperature go up one degree Celsius. From what I researched, water has a high specific heat. Making inferences, I say that conductors have low specific heat and insulators have high specific heat.
4. An ice cube melts in your hand because your hand has a higher degree of temperature than the ice cube and is giving off more thermal energy.
5. Because some materials are conductive and some materials are insulators

sources:
http://www.sparknotes.com/testprep/books/sat2/physics/chapter12section1.rhtml
http://hyperphysics.phy-astr.gsu.edu/hbase/thermo/spht.html

Wednesday, November 3, 2010

Homework for 10/3 Objective #2

1.
2.
3. That matter can be neither created nor destroyed, Antoine Lavoisier
4. Merriam-Webster defines temperature as a degree of hotness or coldness measured on a definite scale.
thermal energy is (to the best of my abilities to define) energy that is given off and felt as heat.
5. Exothermic reaction- gives off heat, hot to touch. Endothermic takes in heat, feels cold to the touch

Sources-
http://www.merriam-webster.com/dictionary/temperature

Tuesday, November 2, 2010

Homework for 10/2- Objective #1

1. Mass can't change, weight can.  Gravitational pull has an effect on weight, but it doesn't affect mass.
2. 619.65cm^3
3. grams/centimeter^3
4. density = mass over volume
5. length * width * height

Sources- http://wiki.answers.com/Q/Why_is_mass_more_useful_than_weight_for_measuring_matter