For someone in the Northern Hemisphere stars rise in the east and set in the west. For someone in the Southern Hemisphere
A. the opposite is true-stars rise in the west and set in the east.
B. the situation is the same-stars also rise in the east and set in the west.
Answer: B
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A power line with a resistance of 2 ohms carries a current of 80 A. The power dissipated in the line is
A) 40 W. B) 160 W. C) 320 W. D) 12,800 W. E) none of the above
A 200 ft. high by 60 ft. wide building is on fire, and one of its walls is at 1500ºF. Air at 100ºF and 40% relative humidity is near the building as shown in the figure. Estimate the net heat transfer to the air from this burning wall if the wall’s emissivity is 0.85.
A comet is observed to pass 
m from the surface of the sun. The sun’s radius is 
m. What is the speed of the comet at this point, if its speed when passing the Earth’s orbit, 
m from the sun’s center, is 25km/s?
A. 561 km/s B. 618 km/s C. 562 km/s D. 585 km/s
If the scalar (dot) product of two vectors is negative, it means that
a. there was a calculator error. b. the angle between the vectors is less than 90 degrees. c. the angle between the vectors is 90 degrees. d. the angle between the vectors is greater than 270 degrees. e. the angle between the vectors is between 90 and 180 degrees.