The Stock system of nomenclature uses
a. Roman numerals.
b. Greek prefixes.
c. Arabic numerals.
d. Egyptian hieroglyphics.
a
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When an electron is formed from a gamma ray collision, a positron is also made
Indicate whether the statement is true or false
A car heading north suddenly collides at an intersection with a truck of the same mass heading east. If they lock together and travel at at 15° north of east just after the collision, how fast was the car initially traveling?
A) 14 m/s B) 7 m/s C) 28 m/s D) 11 m/s
An object moves 10.0 m east in 10.0 s and then returns to its starting point taking an additional 40.0 s. If west is chosen as the positive direction, what is the average speed of the object?
a. 0.4 m/s b. –0.4 m/s c. 10.0 m/s d. 0 m/s e. –10.0
This graph shows a light curve for a star. What can you conclude from this graph?
A) The star periodically dims and brightens, with a brightness peak about once a year. B) The star is orbited by a large planet. C) The star is about 100 times as bright as the Sun. D) The star is moving alternately toward and away from us.