A pattern of dark lines on a continuous background is referred to as
A) an emission line spectrum
B) an absorption line spectrum
C) a continuous spectrum
D) a dark spectrum
B
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Projectile Motion: At a location where g = 9.80 m/s2, a projectile returns to its original height after 4.08 seconds, during which time it travels 76.2 meters horizontally. If air resistance can be neglected, what was the projectile's initial speed?
Fill in the blank(s) with the appropriate word(s).
Power: A simple circuit has a total resistance of 30 ?. If a 2.0-A current is maintained in this circuit, how much energy is dissipated in this circuit in 4.0 seconds?
A. 24 J B. 4.8 J C. 48 J D. 480 J E. 6.0 J
Two long parallel wires lie in the xz plane. One wire passes through the point (?2 m, 0, 0) and the other through the point (+2 m, 0, 0). The wires carry equal currents in the positive z direction. 1 . The magnetic field at (?3 m, 0, 0) is in the negative y direction. 2 . The magnetic field at (?1 m, 0, 0) is in the positive y direction. 3 . The magnetic field at (+1 m, 0, 0) is in the
positive y direction. 4 . The magnetic field at (+3 m, 0, 0) is in the negative y direction. a. 1 and 2 are correct. b. 1 and 4 are correct. c. 2 and 3 are correct. d. 3 and 4 are correct. e. None of the above are correct.
An airplane pilot experiences weightlessness as she passes over the top of a loop-the-loop maneuver. If her speed is 200 m/s at the time, find the radius of the loop