A plot of land contains 5.8 acres. How many square meters does it contain? [1 acre = 43,560 ft2]
A) 2.3 × 104 m2
B) 7.1 × 103 m2
C) 7.0 × 104 m2
D) 5.0 × 104 m2
A
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A traffic light weighing 100 N is supported by two ropes as shown in the figure. The tensions in the ropes are closest to
A) 50 N. B) 56 N. C) 63 N. D) 66 N. E) 83 N.
A boat travels upstream and after one hour has gone 10 km. The boat next travels downstream and after one hour has gone 18 km. If the boat's speed relative to the water is constant, what is the speed of the current in the river?
a. 3 km/h b. 4 km/h c. 5 km/h d. 6 km/h e. 7 km/h
Which of the following is not an appropriate unit for measuring acceleration?
A. m/min2 B. miles/hr/s C. km/min/s D. m/s E. ft/s2
Where on the celestial sphere would you look for the planets?
A. in the zodiac (near the ecliptic)
B. on the galactic equator
C. at the north celestial pole
D. on the celestial equator