The Stock system of nomenclature uses
a. Roman numerals.
b. Greek prefixes.
c. Arabic numerals.
d. Egyptian hieroglyphics.
a
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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.
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