The Sun's effect on tides is greater than the Moon's because of its greater mass
Indicate whether the statement is true or false
FALSE
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A debris disk is a disk of dust found by infrared observations around some stars
Indicate whether the statement is true or false
The short lifetime of muons created in the upper atmosphere of the Earth would not allow them to reach the surface of the Earth unless their lifetime increased by time dilation. From the reference system of the muons, the muons can reach the surface of the Earth because
a. time dilation increases their velocity. b. time dilation increases their energy. c. length contraction decreases the distance to the Earth. d. the relativistic speed of the Earth toward them is added to their velocity.
Active galaxies were first discovered by observations in the _______________ wavelength band
Fill in the blank(s) with correct word
The surface of which jovian moon most resembles the pack ice of the Arctic Ocean?
A) Amalthea B) Io C) Europa D) Ganymede E) Callisto