_____ are the most distant visible objects in the Universe
A) White dwarf stars
B) Quasars
C) Red giant stars
D) Pulsars
B
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If your pupils have a diameter of about 5 mm, about how many times more light gathering power does a telescope with a diameter of about 20 cm (8 inches) have than your pupils?
A. 4 times B. 160 times C. 16 times D. 40 times E. 1,600 times
A series circuit consists of ac source, a 90-? resistor, a 0.80-H inductor, and an 80-?F capacitor. The frequency of the source is adjusted so that the capacitive reactance is equal to twice the inductive reactance
What is the frequency of the source? A) 13 Hz B) 14 Hz C) 17 Hz D) 19 Hz E) 16 Hz
In diagrams of magnetic fields, the symbol
is used to represent
A. the region of no magnetic field. B. the north magnetic field. C. the magnetic field coming out of the paper. D. the magnetic field going into the paper. E. the magnetic field.
What is diffusional velocity?
What will be an ideal response?