Note the direction at which the light strikes Earth’s surface in both the northern and southern hemispheres. What season are we having in the Southern Hemisphere?
a. winter
b. summer
c. fall
d. spring
Ans: d. spring
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In what way do observations of binary star systems support the special theory of relativity?
A) Stars in binary systems often orbit at speeds close to the speed of light, allowing us to check whether time dilation really occurs. B) Stars in binary systems are moving, so we can compare their moving masses to their rest masses. C) The fact that the stars appear distinct supports the idea that the speed of light is unaffected by the motion of the stars. D) Binary systems have two stars, and therefore give us twice the opportunity to test the theory than single star systems.
The angular resolution of a telescope is never less than its diffraction limit
Indicate whether the statement is true or false
The energy generated by the Sun is released by the _______ to make _______ nuclei
a. fusion of H nuclei; He b. fusion of He nuclei; H c. fission of H nuclei; He d. fission of He nuclei; H
A lossless compression reduces the file size of your video.
Answer the following statement true (T) or false (F)