In a parallel universe, the quantity ? has the value 3.14049… . Express ? in that universe to (a) four significant figures (b) five significant figures
What will be an ideal response?
(a) 3.140 (b) 3.1405
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The corona and chromosphere of the sun are believed to be heated by
a. shock waves rising from below the photosphere. b. the solar wind. c. sunspots. d. high energy particles being accelerated by the sun's magnetic field. e. differential rotation.
Two satellites with equal rest masses of 100 kg are traveling toward each other in deep space. One is traveling at 0.650c and the other at 0.850c
The satellites collide and somehow manage to stick together. What is the rest mass of the combined object after the collision? A) 100 kg B) 200 kg C) 277 kg D) 378 kg E) 312 kg
The energy used by a 100-watt light bulb in 1 hour is
a. 0.01 J. b. 360,000 J. c. 100 J. d. 6,000 J. e. none of the above.
Which of the following statements best reflects our current knowledge about the term flife in the equation
Number of Civilizations = NHP × flife × fcivilization × fnow? A) The value of flife is either 0 or 1, but not anything in between. B) The value of flife is between 0 and 1. C) The value of flife is less than 0.0000001. D) The value of flife is equal to 1/2. E) The value of flife is greater than 0.9.