A wave travels an average distance of 1 m in 1 s with a frequency of 1 Hz. Its amplitude is
A) less than 1 m.
B) 1 m.
C) more than 1 m.
D) not enough information
Answer: D
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Suppose a particle is being accelerated through space by a 10-N force. Suddenly the particle encounters a second force of 10 N in the opposite direction. The particle with both forces acting
A) is brought to a rapid halt. B) decelerates gradually to a halt. C) continues at the speed it had when it encountered the second force. D) theoretically tends to accelerate toward the speed of light. E) none of the above
A bullet is fired from ground level with a speed of 150 m/s at an angle 30.0° above the horizontal at a location where g = 10.0 m/s2. What is the vertical component of its velocity after 4 seconds?
A) 150 m/s B) 35 m/s C) 130 m/s D) 75.0 m/s E) 37.5 m/s
The Cassini space probes used electricity provided by __________
Fill in the blank(s) with correct word
Most stable types of nuclei have an ______________ number of protons and an ______________ number of neutrons
a. even; odd b. odd; odd c. odd; even d. even; even