Rank the following media in order according to the speed of light in them, from slowest to fastest: vacuum, air, water and glass
a. air, water, glass, vacuum
b. glass, air, water, vacuum
c. water, glass, air, vacuum
d. glass, water, air, vacuum
e. none of the above
D
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The variables m1 and m2 that appear in the equation F = Gm1m2/r2 are
a. the straight-line distance between the centers of each object. b. the rate at which each object is moving. c. the mass of each object. d. the diameter of each object.
A pulsar with a pulse period of only a few milliseconds is referred to as a dotted pulsar
Indicate whether the statement is true or false
Which is correct?
A.) 6 flavors of quarks and 6 flavors of antiquarks. B.) 3 flavors of quarks and 3 flavors of antiquarks. C.) 6 flavors of quarks and 2 flavors of antiquarks. D.) 2 flavors of quarks and 2 flavors of antiquarks. E.) 12 flavors of quarks and antiquarks can't exist at all.
A certain 20-A circuit breaker trips when the current in it equals 20 A. What is the maximum number of 100-W light bulbs you can connect in parallel in an ideal 120-V dc circuit without tripping this circuit breaker?
A) 27 B) 11 C) 17 D) 23