Springs: An ideal spring has a spring constant (force constant) of 60 N/m. How much energy does it store when it is stretched by 1.0 cm?

A. 0.0030 J
B. 0.30 J
C. 60 J
D. 600 J


Answer: A

Physics & Space Science

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An auditorium has a volume of 6 × 10^3 m3 . How many molecules of air are needed to fill the auditorium at one atmosphere and 0°C?

a. 1.6 × 10^29 b. 1.6 × 10^27 c. 1.6 × 10^25 d. 1.6 × 10^23 e. 1.6 × 10^20

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A car is approaching a radio station at a speed of 25.0 m/s. If the radio station broadcasts at a frequency of 74.5 MHz, what change in frequency does the driver observe?

A) 98.3 Hz B) 6.21 Hz C) 726 Hz D) 67.0 Hz E) 64.5 Hz

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Due to absorption of shorter wavelengths by interstellar dust clouds, distant stars appear

A) brighter. B) redder. C) larger. D) bluer. E) to have a higher radial velocity.

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The process by which raindrops are formed by the collision of droplets is called

a. the Bergeron process. b. fusion. c. fission. d. coalescence.

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