April 16, 2013

Physical Science B(Tues.)

Bellwork:
    1.  Why does electricity have such a dramatic effect on the human body?

    2.  What are two types of light bulbs?
   
Objectives:
    1.  Understand the difference between AC and DC current.  Be able to identify the sources of these two     types     of current and how they are produced.

Practice test over electricity.  Go over the answers and discuss any issues that we may have over the topics. 

When we have gone over the practice test, I would like you to make a list of the topics that you would like to have me go back over while we have time. 

HW: Study for the test over electricity. 

Physics B (Tuesday)

Bellwork
    1.  Explain how waves reflect off a surface.

    2.  What is the normal line?

    3.  On a plane mirror, how does the image distance compare to the object distance?

    4.  What happens to the wavelength of a wave as the frequency is increased?


Discuss reflection.

Go over the lab.  Discuss the results.

Calculate the speed of sound.  We will need to work as a team to get this done.  As a group we will need to combine data to solve.  We will need:
            a.  twelve timers
            b.  one cymbal crasher
            c.  three distance markers
            d.  one hammer person

HW: Finish the calculations on the speed of sound. Be sure to fill in the graph.