An aquifer is a reservoir of water beneath the ground surface. Describe five physical zones in an aquifer. (Hint: Consider in-flow and out-flow.)
What will be an ideal response?
Answer: Unsaturated zone, saturated zone, water table, recharge area, and discharge area. The unsaturated zone is where pore spaces are partially filled with water, below this area is the saturated zone where all pore spaces are filled with water. The boundary between these two zones is the water table. Water enters an aquifer in a recharge area. Water leaves an aquifer at a discharge area—streams, artesian wells or springs, man-made wells, or as it enters a lake or ocean.
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A neutron has a mass of 1.67 × 10^-27 kg. The de Broglie wavelength is 1.4 × 10^-10 m. How fast is the neutron going? (in m/s)
a. 3.4 × 10^3 b. 2.8 × 10^3 c. 3.9 × 10^3 d. 2.6 × 10^3 e. 1.7 × 10^3
In astronomy, an interferometer can be used to
A) decrease the effects of light pollution in getting darker sky backgrounds. B) yield better seeing conditions with optical telescopes. C) increase the sensitivity of infrared telescopes to longer wavelengths. D) speed up the processing of CCD images. E) improve the angular resolution of radio telescopes.
Why don't we see the constellation Orion all year?
a) As the Earth orbits the Sun, its nighttime side points to different constellationsat different points along its orbit. b) It is frequently eclipsed by the Moon. c) When we are close to Orion it appears bright, but when we are far away it gets toofaint to see. d) Half the year it is visible in North America, and the other half in SouthAmerica. e) It is not along the Ecliptic path and only the constellations of the Zodiac are visibleall year round.
The direct transition from solid ice to gaseous water vapor is known as _______.
What will be an ideal response?