An 80.0-g puck moving at 1.20 m/s on an air table collides with a stationary 100-g puck
After the collision, the 80.0-g puck moves in a direction that makes an angle of 45.0° with the original direction of motion and the 100-g puck moves at an angle of 12.0° in the opposite direction. What is the speed of the 80.0-g puck after the collision?
A) 0.809 m/s
B) 0.297 m/s
C) 0.533 m/s
D) 0.0953 m/s
E) 1.23 m/s
B
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Two bulbs are shown in a circuit that surrounds a region of increasing magnetic field directed out of the page. When the switch is closed,
A. bulb 1 glows more brightly. B. bulb 2 glows more brightly. C. both bulbs continue to glow with the same brightness. D. bulb 1 goes out. E. bulb 2 goes out.
Two solenoids are each made of 2000 turns of copper wire per meter. Solenoid I is 2 m long, while solenoid II is 1 m long. When equal currents are present in the two solenoids, the ratio of the magnetic field BI along the axis of solenoid I to the magnetic field BII along the axis of solenoid II, BI/BII, is
a. 1/4. b. 1/2. c. 1. d. 2 e. 4.
What is the wave speed of a wave traveling an average distance of 6 meters in one second?
A) less than 0.2 m/s B) 1 m/s C) 3 m/s D) 6 m/s E) more than 6 m/s
Tuning forks #1, #2, and #3 each have slightly different frequencies.When #1 and #2 are sounded together, a beat frequency of 3 Hz results. When #2 and #3 are sounded together, a beat frequency of 5 Hz results. If the frequency of #1 is 100 Hz, which of the following cannot be the frequency of #3?
A. 92 Hz B. 95 Hz C. 98 Hz D. 102 Hz E. 108 Hz