Conversion of Units: A football field is 120 yd long and 50 yd wide. What is the area of the football field, in square meters, given that 1.0 yd = 91.44 cm?
A. 2.4 × 103 m2
B. 3.7 × 103 m2
C. 4.2 × 103 m2
D. 5.0 × 103 m2
Answer: D
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Angular Quantities: At a certain instant, a compact disc is rotating at 210 rpm. What is its angular speed in rad/s?
A. 11 rad/s B. 22 rad/s C. 45 rad/s D. 69 rad/s E. 660 rad/s
An electric generator
A) can create enough energy to light cities. B) can convert mechanical energy to electric energy. C) needs no energy source. D) all the above E) none of the above
To prevent a home electric circuit from overheating because of too much current, a(n) ______________ is used
Fill in the blank(s) with correct word
Which of the following best describes the image for a thin, concave lens that forms whenever the magnitude of the object distance is less than that of the lens's focal length?
a. inverted, diminished, and real c. inverted, enlarged, and real b. upright, diminished, and virtual d. upright, enlarged, and virtual