Most of the mass of the Milky Way is located in the halo of the galaxy in the form of dark matter
Indicate whether the statement is true or false
TRUE
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A star spends most of its life
A: As a Main Sequence star B: As a protostar C: In explosions lasting millions of years D: As a red giant or supergiant E: Burning Carbon to Oxygen
What is the longest wavelength in the Paschen series?
A) 2.01 nm B) 1.88 nm C) 365 nm D) 2.01 ?m E) 1.88 ?m
If each frame of a motion picture film is 35 cm high, and 24 frames go by in a second, estimate how many frames are needed to show a two-hour-long movie
a. 1400 b. 25,000 c. 50,000 d. 170,000 e. This cannot be determined without knowing how many reels were used.
An electron, initially at rest is accelerated through a potential difference of 550 V. What is the speed of the electron due to this potential difference?
A) 1.44 × 106 m/s B) 1.59 × 106 m/s C) 6.10 × 106 m/s D) 18.7 × 106 m/s E) 13.9 × 106 m/s