Which of the following planets has the least substantial atmosphere?
A) Mercury B) Mars C) Earth D) Neptune E) Venus
A
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A total solar eclipse occurred in Wolf Point, Montana, on Feb. 26, 1979 . When was (will) an eclipse like this eclipse next (be) visible again in Montana? Hint: A Saros is 18 years and 11 1/3 days. Twice a Saros is 36 years 22 2/3 days. Three times a Saros is 56 years 34 days. So the best choice answer of these listed will be late ______
a. August of 1979 b. March of 2033 c. March of 1997 d. March of 1979 e. January of 2000
A current I = 3 sin (400 t) amperes flows in a series RL circuit in which L = 1 mH and R = 100 ?. What is the average power loss?
A. 225 W B. 450 W C. 980 W D. 1.12 kW E. 900 W
Two slits are illuminated with green light (? = 540 nm). The slits are 0.05 mm apart and the distance to the screen is 1.5 m. At what distance (in mm) from the central maximum on the screen is the average intensity 50% of the intensity of the central maximum?
A. 1 B. 3 C. 2 D. 4 E. 0.4
A 62.0-kg woman runs up a flight of stairs having a rise of 4.28 m in a time of 4.20 s. What average power did she supply?
a. 63.2 W b. 619 W c. 596 W d. 629 W e. 609 W