Sound A has a high pitch and sound B has a low pitch. Which of the following statements about these two sounds are correct? (There could be more than one correct choice.)
A) The wavelength of A is longer than the wavelength of B.
B) The period of A is shorter than the period of B.
C) The frequency of A is greater than the frequency of B.
D) Sound B travels faster than sound B through air.
E) The amplitude of A is larger than the amplitude of B.
B, C
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A 4.20-g bullet embeds itself in a 20.0-kg block, which is attached to a horizontal spring with a force constant of 950 N/m. The maximum compression of the spring is 2.10 cm. What is the speed of the bullet just before it hits the block?
A) 690 m/s B) 700 m/s C) 672 m/s D) 900 m/s E) 952 m/s
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A) an outside source of energy. B) a copper lattice. C) positive ions. D) none of the above