The bell with the highest natural frequency is relatively
A) small.
B) large.
C) either of these
Answer: A
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An object is accelerating if it moves
1) with constant velocity 2) in a circular path 3) in a straight-line path because it is undergoing a change in its 4) speed. 5) direction. 6) net force.
Uniform Electric Fields: Two isolated copper plates, each of area 0.40 m2, carry opposite charges of magnitude 7.08 × 10-10 C. They are placed opposite each other in parallel alignment, with a spacing of 4.0 cm between them. What is the potential difference between the plates? (?0 = 8.85 × 10-12 C2/N ? m2)
A. 0.40 V B. 3.0 V C. 3.2 V D. 7.6 V E. 8.0 V
A man standing on a bridge throws a stone horizontally with a speed of 20 m/s. The stone hits the water below 2.5 s later. The bridge is
A. 60.1 m high. B. 30.6 m high. C. 44.1 m high. D. 20.3 m high.
Which statement best describes the greenhouse effect? a. infrared radiation escapes into space
b. ultraviolet radiation enters a planet's atmosphere producing a green haze c. visible radiation is trapped by the atmosphere. d. infrared radiation is trapped by the atmosphere. e. oxygen escapes from the atmosphere.