A lamp is on a dimmer switch. As you turn the switch from the lowest setting to the highest setting, which statement would best describe what happens?
A)
B)
The light bulb consumes less electricity, burns dimmer and uses more
power.
The light bulb consumes more electricity, burns brighter and uses more
power.
The light bulb consumes less electricity, bums brighter and uses more
power
The light bulb consumes more electricity, burns brighter and uses less
power.
c)
D)

How have the competing explanations' experiments on atoms affected the development of the atomic model?

Follow these directions and answer the questions. 1. set up the ripple tank as in previous investigations. 2. bend the rubber tube to form a "concave mirror" and place in the ripple tank. the water level must be below the top of the hose. 3. generate a few straight pulses with the dowel and observe the reflected waves. do the waves focus (come together) upon reflection? can you locate the place where the waves meet? 4. touch the water surface where the waves converged. what happens to the reflected wave? 5. move your finger twice that distance from the hose (2f = c of c, center of the curvature) and touch the water again. does the image (the reflected wave) appear in the same location (c of c)? you may have to experiment before you find the exact location. sometimes it is hard to visualize with the ripple tank because the waves move so quickly. likewise, it is impossible to "see" light waves because they have such small wavelengths and move at the speed of light. however, both are examples of transverse waves and behave in the same way when a parallel wave fronts hit a curved surface.

Tall pacific coast redwood trees can reach heights of about 100 m. if air drag is negligibly small, how fast is a sequola cone moving when it reaches the ground f it dropped from the top of a 100 m tree?