Dean teaches that the phenomenon of regelation is due to the
A) freezing point of water.
B) melting point of ice.
C) open-structured nature of ice crystals.
D) high specific heat of water.
Answer: C
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In a diffraction experiment, light of 600. nm wavelength produces a first-order maximum 0.350 mm from the central maximum on a distant screen
A second monochromatic source produces a third-order maximum 0.870 mm from the central maximum when it passes through the same diffraction grating. What is the wavelength of the light from the second source?
What is the shortest-wavelength X-ray photon emitted in an X-ray tube subject to 50 kV?
A) 0.025 nm B) 0.25 nm C) 2.5 nm D) 25 nm E) none of the given answers
Which of the following frequencies could NOT be present as a standing wave in a 2m long organ pipe open at both ends? The fundamental frequency is 85 Hz
a. 85 Hz. b. 170 Hz. c. 255 Hz. d. 340 Hz. e. 382 Hz.
Why do we call dark matter "dark"?
A) It blocks out the light of stars in a galaxy. B) It emits no radiation that we have been able to detect. C) It contains large amounts of dark-colored dust. D) It is dark brown or dark red in color.