Ch6_LuoR

=toc __**Chapter 6: Work, Energy, and Power**__=

__1/12/12__
A1.)Q. What is work? How do you calculate work?
 * Lesson 1: Basic Terminology and Concepts**

R. Work is the force acted upon an object that causes displacement in the object. You calculate work by multiplying the force done on the object, the displacement of the object, and the cosign of the angle between the force vector and displacement vector together.

Summary: In order to understand what work is, it is important to have an understanding of what the variables to calculate work mean. These variables are force, displacement, and the cosign of the angle between the vectors. The force is the force acted upon the object, the displacement is how far the object moved, and the cosign of the angle between the vectors refers to the angle between the force vector and displacement vector. All of these concepts have been taught in the previous physics chapters.

__Energy Consumption Analysis__
Total # kilo Watts Used Per Day: 23.0 Total Amount Due in Month of January: $101.43 kWh Consumed: 646 9.89¢ per kWh
 * Item || kW used || Hours/Day || kWh/Day ||
 * 1. TV || .129 || .662 || .0805 ||
 * 2. Desktop || .200 || .0143 || .00286 ||
 * 3. Refrigerator || .475 || 24.0 || 11.4 ||
 * 4. Toaster || .800 || .0445 || .0356 ||
 * 5. Garage Door Opener || .350 || .0104 || .00364 ||
 * 6. Freezer || .445 || 24.0 || 10.7 ||
 * 7. Electric Dryer || 4.00 || .0800 || .320 ||
 * 8. Clock Radio || .001 || 24.0 || .0240 ||
 * 9. Microwave || 1.50 || .00267 || .00401 ||
 * 10. Light Bulb || .075 || 5.73 || .430 ||
 * On Electric Bill:**

Avg= (Total Amount of Money Consumed)/(Total kWh Consumed) Avg= (101.43)/(646)= $.157/kWh (Basic Charges and Tax Included) My Costs: 23*.0989= $2.27/day 2.27*30= $68.24
 * Calculations:**

This cost seems reasonable. I do not use my appliances that much at home, and the top 2 things that consumed the most amount of energy, the refrigerator and freezer, are used by everyone in my family and always on. The electric dryer is also used by everybody in my family as we always wash our clothes together. In actuality, I cost my parents $1.72 according to the table. If I wanted to cut down on the kWh I use, though, I can turn the lights out in my room more frequently when I am not there, as I usually leave them on even when I am not in the room, except for going outdoors.

The activity showed me how the electric bill is calculated every month for my family. It also showed me how much I cost my parents, and what I should do to cut back on the electricity bill. All my family has to do now is to convince my sister to stop watching TV so much every single day and our electric bill will drop dramatically.