If a water sample contains 2 ppm of dissolved salt, it contains 2 g of salt in every ______________ g of water
Fill in the blank(s) with correct word
million
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The fact that Venus' atmosphere contains carbon dioxide was discovered:
A) by the Magellan spacecraft. B) in early spectroscopic studies. C) by the Venera spacecraft. D) in radar studies. E) through CCD imagery.
In a single-slit diffraction experiment, a beam of monochromatic light passes through a slit of width 11.0 ?m. If the first order dark fringe of the resulting diffraction pattern is at an angle of 4.61°, what is the wavelength of light?
A) 884 nm B) 301 nm C) 602 nm D) 402 nm E) 201 nm
According to the nuclear energy curve, would fusion or fission or neither release nuclear energy from gold [atomic number 79], and why?
A) Fission, because then the reaction products have higher atomic numbers and thus a higher nuclear energy. B) Fusion, because then the reaction product has a higher atomic number and thus a lower nuclear energy. C) Fission, because then the reaction products have lower atomic numbers and thus a lower nuclear energy. D) Neither, because all other elements have higher nuclear energies than carbon. E) Fusion, because then the reaction product has a lower atomic number and thus a higher nuclear energy.
Suppose two flat glass plates 30-cm long are in contact along one end and separated by a human hair at the other end. If the diameter of the hair is 50 ?m, find the separation of the interference fringes when the plates are illuminated by green light, ? = 546 nm