Blue stars are hotter than red stars
Indicate whether the statement is true or false
T
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The first scientific attempt to map the Milky Way galaxy
a. showed that the Sun was located in the center of the system of planets making up our galaxy. b. showed that our galaxy is a round ball on which we live. c. showed that our galaxy has 9 stars. d. used globular clusters to determine the location of the center of the Earth. e. was completed by William and Caroline Herschel.
A force of 10 N acts on a charge of 5.0 ?C when it is placed in a uniform electric field. What is the magnitude of this electric field?
A) 50 MN/C B) 2.0 MN/C C) 1.0 MN/C D) 0.50 MN/C E) 1000 MN/C
Earth's original atmosphere was
A) very similar to the atmosphere we have today. B) rich in both O2 and O3. C) obliterated after the birth of the Sun. D) a mixture of N2, CO2, and O3.
If light from a distant star passes close to a massive body, the light beam will
A) bend towards the star due to gravity. B) continue moving in a straight line. C) change color to a shorter wavelength. D) slow down. E) accelerate due to gravity.