In the chrome plating of steel automotive parts, it is found that it is possible to have a high-quality coating with a current density of 0.4 A/cm 2 by heating the chromic acid solution to 65°C and using a chrome anode.
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Which of the following correctly lists the described speeds from slowest to fastest?
A) Earth's orbital speed about the Sun Earth's speed of rotation on its axis Earth's orbital speed about the Sun typical speeds of stars in the local solar neighborhood relative to us the speed of our solar system orbiting the center of the Milky Way Galaxy the speeds of very distant galaxies relative to us B) typical speeds of stars in the local solar neighborhood relative to us Earth's speed of rotation on its axis Earth's orbital speed about the Sun the speed of our solar system orbiting the center of the Milky Way Galaxy the speeds of very distant galaxies relative to us C) Earth's speed of rotation on its axis Earth's orbital speed about the Sun the speed of our solar system orbiting the center of the Milky Way Galaxy the speeds of very distant galaxies relative to us typical speeds of stars in the local solar neighborhood relative to us D) Earth's orbital speed about the Sun the speeds of very distant galaxies relative to us Earth's speed of rotation on its axis typical speeds of stars in the local solar neighborhood relative to us the speed of our solar system orbiting the center of the Milky Way Galaxy E) typical speeds of stars in the local solar neighborhood relative to us the speed of our solar system orbiting the center of the Milky Way Galaxy Earth's orbital speed about the Sun the speeds of very distant galaxies relative to us Earth's speed of rotation on its axis
Propene and cyclopropane are
a. the same compound. b. isomers. c. neither isomers nor the same compound.
The wavelength of a ruby laser is 694.3 nm. What is the energy difference between the two energy states involved in laser action? (c = 2.9979 × 108 m/s, h = 6.626 × 10-34 J ? s, 1 eV = 1.6022 × 10-19 J)
A) 1.812 eV B) 1.537 eV C) 3.572 eV D) 1.786 eV E) 1.646 eV
For which of the following does the Bohr model give good results?
1.the energy of the photons in the Balmer series 2.the filling of the electron shells 3.the splitting of the spectral lines for a source in a magnetic field 4.the fine structure of spectral lines