Determine the current in the 10-V emf.
A. 2.3 A
B. 2.7 A
C. 1.3 A
D. 0.30 A
E. 2.5 A
Answer: A
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If the headlights on a car are separated by 1.3 m, how far down the road can they be resolved if the angular resolution of the eye is about 5 × 10-4 rad?
A) 1.3 km B) 5.0 km C) 4.8 km D) 0.65 km E) 2.6 km
Double-Slit Interference: At most, how many bright fringes can be formed on one side of the central bright fringe (not counting the central bright fringe) when light of 625 nm falls on a pair of slits that are 6.77 × 10-6 m apart?
A. 10 B. 9 C. 8 D. 11 E. 12
A football kicker is attempting a field goal from 44m out. The ball is kicked and just clears the lower bar with a time of flight of 2.9s If the angle of the kick was 45°, what was the initial speed of the ball, assuming no air resistance?
A) 39 m/s B) 2.2 m/s C) 21.5 m/s D) 19.7 m/s
What happens when matter collides with anti-matter?
A) The two particles repel each other, and they fly apart. B) The two particles destroy each other, and create photons. C) The two particles attract each other, and form a neutral atom.