Looking forward, common consensus will likely agree that the wisest use of fossil fuels is to
A) convert them to heat and smoke.
B) save them for tomorrow's materials.
C) extract and sell them as quickly as possible.
D) all of the above
Answer: B
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A laser beam passes through a thin slit
When the pattern is viewed on a screen 1.25 m past the slit, you observe that the fifth-order dark fringes occur at ±2.41 cm from the central bright fringe. The entire experiment is now performed within a liquid, and you observe that each of the fifth-order dark fringes is 0.790 cm closer to the central fringe than it was in air. What is the index of refraction of this liquid? A) 1.33 B) 3.05 C) 1.62 D) 1.40 E) 1.49
Quasars are most common with redshifts
a. less than 0.1 b. less than 0.5 c. of about 2 d. greater than 6 e. greater than 8
Two balls, projected at different times so they don't collide, have trajectories A and B, as shown below.
Which statement is correct?
A. v0B must be greater than v0A. B. Ball A is in the air for a longer time than ball B. C. Ball B is in the air for a longer time than ball A. D. Ball B has a greater acceleration than ball A. E. Ball A has a greater acceleration than ball B.
Two or more bound atoms is called a ________________
Fill in the blank(s) with correct word