An angle of 1 arcsecond is
A) about the width of your fist held at arm's length.
B) about the width of a finger held at arm's length.
C) less than the thickness of a human hair held at arm's length.
D) slightly more than the width of a basketball held at arm's length.
C
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The length and width of a rectangle are 1.125 m and 0.606 m, respectively. Multiplying, your calculator gives the product as 0.68175. Rounding properly to the correct number of significant figures, the area should be written as
A) 0.7 m2. B) 0.68 m2. C) 0.682 m2. D) 0.6818 m2. E) 0.68175 m2.
Two satellites with equal rest masses of 100 kg are traveling toward each other in deep space. They have identical speeds of 0.600c
The satellites collide and somehow manage to stick together. What is the rest mass of the combined object after the collision? A) 200 kg B) 225 kg C) 250 kg D) 275 kg E) 300 kg
The wavelength at which a blackbody radiates most depends on its
A) radius. B) mass. C) magnetic fields. D) temperature. E) direction of motion.
Two waves are described by ? y1 = 6cos(180t) and y2 = 6cos(186t) (both in meters). ? With what angular frequency does the maximum amplitude of the resultant wave vary with time?
A. 366 rad/s B. 6 rad/s C. 3 rad/s D. 92 rad/s E. 180 rad/s