A student records the rising and setting times of the moon for a month. She notices that the moon rises and sets 50 minutes later each day. She studies these data to develop an explanation for the change in time. What explains this change in the moon’s rising and setting times? * A. Earth revolves around the moon.
B .The moon revolves around the sun.
C .Earth rotates, and the moon revolves around Earth.
D. The moon rotates on its axis, and Earth revolves around the sun.

The metric unit of electrical power is the watt volt ampere ohm

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.

Which of the following are considered noble gases? a. bromine b. neon c. argon d. chlorine