What is the energy density in the magnetic field 25 cm from a long straight wire carrying a current of 12 A? (?0 = 4? × 10-7 T • m/
A)
A) 7.3 × 10-5 J/m3
B) 3.7 × 10-5 J/m3
C) 3.6 × 10-4 J/m3
D) 1.2 × 10-4 J/m3
E) The density cannot be determined without knowing the volume.
B
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A car is traveling with a constant speed when the driver suddenly applies the brakes, causing the car to slow down with a constant acceleration of magnitude 3.50 m/s2
If the car comes to a stop in a distance of 30.0 m, what was the car's original speed? A) 10.2 m/s B) 14.5 m/s C) 105 m/s D) 210 m/s E) 315 m/s
Early astronomers picture the Earth as stationary, with the ________ spinning, moving the stars along with it
Fill in the blank(s) with correct word
Consider a converging lens forming an image on a screen. What property of the image would be affected by covering the top half of the lens?
What will be an ideal response?
A nanometer is
a. one thousandth of a meter. b. one millionth of a meter. c. one billionth of a meter. d. one trillionth of a meter. e. none of the above.