The force constant of HCl is 480 N/m. If the atomic masses are 1 u and 35 u (1 u = 1.66 × 10^?27 kg), find the fundamental frequency (in Hz)
a. 6.4 × 10^13
b. 9.2 × 10^13
c. 7.7 × 10^13
d. 8.7 × 10^13
e. 1.4 × 10^13
d
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Two slits are illuminated with red light (? = 650 nm). The slits are 0.25 mm apart and the distance to the screen is 1.25 m. What fraction of the maximum intensity on the screen is the intensity measured at a distance 3.0 mm from the central maximum?
A. 0.94 B. 0.92 C. 0.96 D. 0.98 E. 0.99
Suppose you see a photo showing Jupiter half in sunlight and half in shadow (that is, a first quarter Jupiter). This photo might have been taken by
A) the Galileo spacecraft that orbited Jupiter in the 1990s. B) the Hubble Space Telescope (which orbits Earth). C) the Keck Telescope on Mauna Kea, Hawaii. D) the Arecibo Radio Telescope in Puerto Rico.
If the specific heat of water were lower than it is, ponds in the cold of winter would be
A) more likely to freeze. B) less likely to freeze. C) neither more nor less likely to freeze.
Refracting Telescope: A student constructs an astronomical telescope with a magnification of 10. If the telescope has an objective lens of focal length 0.50 m, what is the resulting length of the telescope?
A. 53 cm B. 55 cm C. 60 cm D. 75 cm