The center of the Earth is made of
A) solid iron and nickel
B) liquid iron and nickel
C) liquid rock
D) solid rock
A
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Spectroscopic parallax denotes the apparent shift in the position of a star when observed form different positions of a source
Indicate whether the statement is true or false
To send a beam laser-light beam to a space station just above the atmosphere near the horizon, aim your laser
A) above your line of sight. B) below your line of sight. C) along your line of sight.
A 200-? resistor, a 25-mH inductor, and a capacitor are connected in series across an ac voltage source at 1000 Hz. If the impedance of this circuit is 240 ?, what is the value of the capacitor?
A) 5.5 ?F B) 3.2 ?F C) 4.2 ?F D) 6.5 ?F E) 7.5 ?F
The length and width of a rectangle are 1.125 m and 0.606 m, respectively. You calculate the rectangle's perimeter by adding these numbers and multiplying by two. Your calculator's display reads 3.462
To the correct number of significant figures, the perimeter should be written as A) 3.5 m. B) 3.46 m. C) 3.462 m. D) 3.4620 m.