Assume a gram of a substance marketed as "Pure Energy" is annihilated by a gram of a second substance "Anti-Pure Energy." How long would the energy released power a city which uses 109 watts of power?
a. 40 hrs
b. 25 hrs
c. 50 hrs
d. 65 hrs
e. 50 000 hrs
C
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While a rock thrown upward at 50 degrees to the horizontal rises, neglecting air drag, its vertical component of velocity
A) increases. B) remains unchanged. C) decreases.
You stand near the earth's equator. A positively charged particle that starts moving parallel to the surface of the earth in a straight line directed east is initially deflected upwards. If you know there are no electric fields in the vicinity, a possible reason why the particle does not initially acquire a downward component of velocity is because near the equator the magnetic field lines of the
earth are directed a. upward. b. downward. c. from south to north. d. from north to south. e. from east to west.
Which galaxy do you come from?
A: The Andromeda Galaxy. B: The Milky Way Galaxy. C: The Virgo Galaxy. D: The Antenna Galaxy. E: The Whirlpool Galaxy.
While Saturn is almost as large as Jupiter, its mass is only about ________ of Jupiter's
Fill in the blank(s) with correct word