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
b
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In which of the following ways are Pluto and Eris more like comets than like any of the terrestrial or jovian planets?
A) They are made mostly of rock and ice. B) They sometimes enter the inner solar system. C) They have long tails. D) They have thick atmospheres.
You do 174 J of work while pulling your sister back on a swing, whose chain is 5.10 m long
You start with the swing hanging vertically and pull it until the chain makes an angle of 32.0° with the vertical with your sister is at rest. What is your sister's mass, assuming negligible friction? A) 22.9 kg B) 19.5 kg C) 26.3 kg D) 28.4 kg
The diagrams below show forces applied to a wheel that weighs 20 N. The symbol W stands for the weight. In which diagram(s) is(are) the wheel in equilibrium?
A. A B. B C. C D. D E. A and C
An AC voltage source, with a peak output of 200 V, is connected to a 25-W resistor. What is the effective (or rms) current in the circuit?
a. 2.8 A c. 4.0 A b. 5.7 A d. 2.0 A