1. In which classification of waves are radio waves?
a. Mechanical transverse
b. Mechanical longitudinal
c. Emag transverse
d. Emag longitudinal
e. Emag diagonal
2. Based on their frequencies, which carries more energy?
a. FM radio wave
b. Infrared light
c. Microwave
d. Visible light
e. Newtonian wave
3. Count the light bulbs in your house.
a. How much total wattage do you have?
b. How much would it cost to leave all of them on for 1 day? Assume the cost is 12 cents/kw-hr.
4. Based on what we have studied about electrical charges and separations, which of the following are attracted to each other the strongest? (2-pts)
a. A +1 sodium atom separated by 4.0 distance units from a -2 oxygen atom.
b. A +1 hydrogen atom separate by 2.0 distance units from a +4 silicon atom.
c. A -2 oxygen atom in glass separated by 3.0 distance -1 chlorine atom.
d. A +1 sodium atom separated by 2.0 distance units from a -1 oxygen atom.
e. A +4 silicon atom separated by 2.0 distance units from a -2 oxygen atom.
5. If you are standing on a beach and waves come in every 10 seconds, with crests spaced 20 meters apart, what is the frequency of the waves?