April 19, 2013
Physical Science B(friday)

Bellwork:
    1.  What are some of the sources of energy that we use in our homes? Go beyond electricity.

    2.  How has energy for our personal lives become a very important topic for people today?


Discuss renewable vs. nonrenewable resources.

Assignment, you are going to do an internet investigation on alternative fuel sources for automobiles.  Look into what ideas have been proposed and tested in the past, what we are currently using, and what options engineers are looking into for the future. 

Format:
    1.  Need to list a minimum of 8 possible alternative fuel sources.

    2.  Explain what they are, how they are obtained, and renewable vs. non renewable.

    3.  Pros and cons of each source.

Assignment is worth a standard 10 pts.  like all other homework.  Extra credit will be given for each source past four that you find.  You may earn up to 15pts.

Physics B

Quiz today.  Answer any questions that you may have prior to the quiz. 

When finished we will go over the doppler effect problems. 

Finish the speed of sound lab.  We will modify the procedure to ease the process.  You will need to find the speed using 3 tuning forks.  To do so:

        1.  Find the resonant lengths 'L'. 
        2.  'L' is actually 1/4 of a wavelength adjust the # using the factor (.6r added to the length).  Find the         wavelength.
        3.  Use the wavelength and frequency to find the speed of sound.   
        4.  Compare the experimental speed to the actual
                V=331 m/s +.61(T)

        5.  Find the percent difference.