The Earth is 1.49 × 10^11 meters from the sun. If the solar radiation at the top of the Earth's atmosphere is 1 340 W/m2, what is the total power output of the sun?
a. 7.10 × 10^27 W
b. 2.20 × 10^30 W
c. 6.62 × 10^26 W
d. 3.74 × 10^26 W
e. 2.98 × 10^25 W
D
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A telescope that is 1.0 meter in diameter has a focal length of 10 meters. An eyepiece with a focal length of 0.01 meters that is used with this telescope would have a magnification of ____________________?
Fill in the blank(s) with correct word
If two slide projectors are connected in series across the same 120 volt source, the current drawn from the source in amperes is
a. 3 b. 6 c. 9 d. 12 e. none of the above
A wire, 0.60 m in length, is carrying a current of 2.0 A and is placed at a certain angle with respect to the magnetic field of strength 0.30 T. If the wire experiences a force of 0.18 N,
what angle does the wire make with respect to the magnetic field? A) 20° B) 25° C) 30° D) 35° E) 60°
The buoyant force on an object is:
a. the same for all floating objects. b. equal to a constant that depends on the fluid times the weight of fluid that the object displaces. c. inversely proportional to the weight of fluid displaced by the floating object. d. equal to the weight of fluid that the object displaces. e. a fictitious force.