2014年Physics Bowl物理碗真题PDF下载
1.An FM radio station sends a signal with a frequency of 99.99 × 106 Hz. Which one of the following choices best represents this frequency expressed using metric prefixes?
(A) 99.99 kHz (B) 99.99 MHz (C) 99.99 GHz (D) 99.99 THz (E) 99.99 nHz
2.In the laboratory, a student makes the following six measurements for the length of an object: 5.05cm, 5.06 cm, 5.07 cm, 5.06 cm, 5.07 cm, and 5.09 cm. Using the rules of significant digits, which one of the following choices correctly represents how she should express the average length of the object?
(A) 5 cm (B) 5.06 cm (C) 5.066 cm (D) 5.07 cm (E) 5.1 cm
3.An object is dropped into free fall. Through how many meters does the object fall during the first 3.00 seconds of flight?
(A) 10.0 m (B) 15.0 m (C) 30.0 m (D) 45.0 m (E) 90.0 m
4.Three equal masses are suspended from a classroom ceiling by a series of strings as shown in the figure. Which string has the greatest tension?
(A) Only String
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