Why are the rings of Saturn so bright?
A) They are made of young, fresh water ice.
B) They are made of metallic iron, never rusted by exposure to oxygen.
C) Light reflected off of gigantic Titan reinforces the sunlight.
D) They are made of frozen metallic hydrogen.
E) They are made of glassy beads expelled by the volcanoes of Enceladus.
A
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Prior to the time when Luis and Walter Alvarez proposed that an impact led to the extinction of the dinosaurs, it was generally assumed that the dinosaurs had died out over a period of at least thousands to millions of years. Consider each piece of evidence listed below and sort it into the correct bin based on whether it supports a sudden cause for the demise of the dinosaurs or whether it could also be consistent with a gradual cause leading to their demise over many thousands or more years.
Note: The “K-T sediment layer” refers to the geological layer dating to about 65 million years ago that separates sediments that contain dinosaur fossils from those that do not.
Ohm's law gives the relationship between
a. current and voltage. b. work and current. c. current and charge. d. force and current.
What is the magnetic moment of a rectangular loop of 120 turns that carries 6.0 A if its dimensions are 40. mm × 8.0 cm?
What will be an ideal response?
Alpha particles and beta particles are deflected by a magnetic field in
A) opposite directions. B) perpendicular directions to each other. C) the same direction.