A proton, moving in a uniform magnetic field, moves in a circle perpendicular to the field lines and takes time T for each circle. If the proton's speed tripled, what would now be its time to go around each circle?
A) 9T
B) 3T
C) T
D) T/3
E) T/9
C
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Faraday's Law: As shown in the figure, a large round loop of 269 turns and radius 67.0 cm carries a current of I = 78.0 A. A small square loop of 31.0 turns and 1.00 cm on a side is placed at the center of the large loop. If the current in the large loop drops to 0.00 A in 0.0470 s, find the induced emf in the small loop. The square loop is small enough that you can assume that the magnetic field in its region is uniform and equal to the magnetic field at the center of the round loop. (?0 = 4? × 10-7 T ? m/A)
Fill in the blank(s) with the appropriate word(s).
A simply supported beam is loaded as shown in the figure. The bending moment at point C is approximately:
(A) 5.7 kN?m
(B) 6.1 kN?m
(C) 6.8 kN?m
(D) 9.7 kN?m
A 4.00-liter container is divided into two equal parts, one part containing 0.0100 mole of neon, and the other part containing 0.0100 mole of helium. The divider is removed and the gases mix. What is the change in entropy (in J/K) of this system?
A. 0.0576 B. 0.115 C. 0.173 D. 0.0864 E. 0.144
Astronaut Mark Uri is space-traveling from planet X to planet Y at a speed of 0.65c relative to the planets, which are at rest relative to each other
When he is precisely halfway between the planets, a distance of 1.0 light-hour from each one as measured in the planet frame, nuclear devices are detonated on both planets. The explosions are simultaneous in Mark's frame. What is the difference in the time of arrival of the flashes from the explosions as observed by Mark? A) 0 min B) 180 min C) 90 min D) 360 min E) 113 min