The fundamental frequency of a above middle C on the piano is 440 Hz. This is the tenor high A, but a convenient note in the mid-range of women's voices. When we calculate the wavelength, we find that it is
a. much shorter than the length of either a man's or woman's lips.
b. shorter than the length of a man's lips, but about the length of a woman's lips.
c. longer than a woman's lips, but about the length of a man's lips.
d. much longer than the length of either a man's or a woman's lips.
e. about the same length as either a man's or woman's lips.
d
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A 5kg rock and a 10kg rock are dropped from a height of 10m. Which of the following statements describes what happens to the potential energy of the rocks?
a) Neither rock loses potential energy because no work is done on the rocks. b) Bother rocks lose the same amount of potential energy because they fall from the same height. c) The 10kg rock loses more potential energy than the 5kg rock because the 10kg rock falls faster. d) The 10kg rock loses more potential energy than the 5kg rock because the 10kg rock has more mass.
At a depth of about 1030 m in the sea, the pressure has increased by 100 atmospheres (to 1.0 × 107 N/m2). By how much has 1.0 m3 of water been compressed by this pressure? The bulk modulus of water is 2.3 × 109 N/m2
A) 2.3 × 10-3 m3 B) 3.3 × 10-3 m3 C) 4.3 × 10-3 m3 D) 5.3 × 10-3 m3 E) 6.3 × 10-3 m3
Which of the following is the hardest mineral?
a. Quartz b. Diamond c. Talc d. Gypsum
Alexander Litvinenko was assasinated with
A. plutonium B. tritium C. radium D. polonium