Light travels at a speed of 300,000 km/s. About how far is a light-year?
A) 10 million meters
B) 10 billion km
C) 300,000 km
D) 10 million km
E) 10 trillion km
E) 10 trillion km
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A circuit contains two inductors of 6.0 mH inductance in parallel placed in series with an inductor of 8.0 mH inductance. After one of the 6.0 mH inductors burns out, the repairman wants to replace all three inductors with one inductor of equivalent inductance. Assuming inductors combine in series and parallel the same way resistors do, what inductance should he use?
a. 3.0 mH b. 3.4 mH c. 4.8 mH d. 11 mH e. 20 mH
If the net force on an object is zero,
a. there must be no forces acting on the object. b. the object must be at rest. c. the object's acceleration must be zero. d. there can be no friction acting on the object.
Which of the following best describes the Milky Way Galaxy?
A) a spiral galaxy with a disk about 100,000 light-years in diameter B) a spiral galaxy with a disk about 1 billion kilometers in diameter C) a spiral galaxy with a disk about 1000 light-years in diameter D) a spherically shaped galaxy that is about 4 light-years in diameter E) a spherically shaped galaxy that is about 100,000 light-years in diameter
Astronaut Skip Parsec visits planet MSU8, which is composed of the same materials as Earth, but has twice the radius. If Skip weighs 800 N on Earth's surface, how much does he weigh on MSU8's surface?
A. 400 N B. 800 N C. 1600 N D. 3200 N