To minimize heat loss it is best that a teapot be
A) black.
B) silver.
C) depends on size, not color
Answer: B
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An object at the center of curvature of a concave mirror forms an inverted image at the center of curvature itself
Indicate whether the statement is true or false
In a binary system, the more massive star
a. is at the center of mass. b. is farthest from the center of mass. c. is nearest the center of mass. d. follows the largest orbit. e. shows a larger Doppler shift in its spectral lines.
A 6.0-kg object is suspended by a vertical string from the ceiling of an elevator which is accelerating upward at a rate of 1.8 m/s2 . Determine the tension in the string
a. 11 N b. 70 N c. 48 N d. 59 N e. 62 N
?Instructions: On occasion, the notation 
will be a shorthand notation for 
.
If vector 
is added to vector 
, the result is a third vector that is perpendicular to and has a magnitude equal to 3. What is the ratio of the magnitude of to that of ?
A. 1.8
B. 2.2
C. 3.2
D. 1.3
E. 1.6