The inks used in printing the full-color photos in a common magazine are
A) red, green, and blue.
B) red, green, blue, and black.
C) magenta, cyan, and yellow.
D) magenta, cyan, yellow, and black.
E) none of the above
Answer: D
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The evidence for present-day global warming include
A) extreme weather—heat waves and droughts. B) melting of Arctic and Antarctic sea ice and continental ice fields and glaciers. C) severe winter storms, and increased downpours and flooding. D) all of the above.
The ____________________ of the Sun is composed of ionized gas and produces a continuous spectrum with a superimposed emission spectrum
Fill in the blank(s) with correct word
A transformer for charging a power tool steps the line voltage down to 2.9 V. The output current of this transformer is 240 mA. If the transformer is ideal (100% efficient), what is the input current?
A) 9.9 A B) 110 mA C) 240 mA D) 0.70 A E) 5.8 mA
Uniform Circular Motion: In order to simulate weightlessness for astronauts in training, they are flown in a vertical circle. If the passengers are to experience weightlessness, how fast should an airplane be moving at the top of a vertical circle with a radius of 2.5 km?
A. 79 m/s B. 310 m/s C. 260 m/s D. 160 m/s E. 510 m/s