A resistor is made out of a wire having a length L. When the ends of the wire are attached across the terminals of an ideal battery having a constant voltage V0 across its terminals, there is current I through the wire
If the wire were cut in half, making two wires of length L/2, and both wires were attached across the terminals of the battery (the right ends of both wires attached to one terminal, and the left ends attached to the other terminal), how much current would the battery put out? A) 4I
B) 2I
C) I
D) I/2
E) I/4
A
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According to the solar nebula theory, dust grains, whatever their composition, grew from microscopic size first by condensation, then by accretion
Indicate whether the statement is true or false
A standard exam page is 8.5 inches by 11 inches. An exam that is 2.0 mm thick has a volume of
A. 1.9 × 104 mm3. B. 4.7 × 104 mm3. C. 1.2 × 105 mm3. D. 3.1 × 105 mm3. E. 3.1 × 103 mm3.
The figure shows a distance vs. time graph of an object with three distinct regions, I, II, and III
?
The object’s velocity is negative in region(s)
a.
I.
b.
II.
c.
III.
d.
no regions
Which of the following statements is true of the apparent magnitude scale that refers to stellar apparent brightness?
A) It tells you the intrinsic brightness of a star. B) It tells you how bright stars appear to you on Earth. C) It tells you the amount of light a star produces. D) It tells you the accurate distance between two stars.