If molecules in the sky scattered orange light instead of blue light, sunsets would be colored
A) orange.
B) yellow.
C) green.
D) blue.
E) none of the above
Answer: D
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In a phase diagram, the _____________line gives the temperature where the first solid forms upon cooling an alloy of given composition C0 from the liquid phase.
Fill in the blank(s) with the appropriate word(s).
A car on a roller coaster starts at zero speed at an elevation above the ground of 26 m. It coasts down a slope, and then climbs a hill. The top of the hill is at an elevation of 16 m. What is the speed of the car at the top of the hill?
Neglect any frictional effects. A) 14 m/s B) 18 m/s C) 10 m/s D) 9.0 m/s E) 6.0 m/s
A planet has the orbit shown below. Use the 8 labeled points to answer all questions
Two sound waves can interfere:
1.only when traveling in the same direction. 2.only when the frequencies are the same. 3.only when both are sinusoidal. 4.only when the phase difference is constant. 5.None of the above.