Automobile engine blocks are made with _________cast iron.
Fill in the blank(s) with the appropriate word(s).
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Which of the following statements is true of L dwarfs?
A) They are cooler than M stars. B) They are cooler than T dwarfs. C) They are fainter than T dwarfs. D) They are brighter than M stars.
The ground-state energy of an electron in a hydrogen atom is ?13.6 eV. This means that the binding energy of that electron is
A. ?13.6 eV. B. +13.6 eV. C. Some other value (specify).
Contrast the orbital eccentricity and axial tilt of Jupiter and Saturn
What will be an ideal response?
The noble gases, listed by increasing molecular weight, are He, Ne, Ar, Kr, Xe, and Rn. If samples of 1 mole each of these gases are placed in separate containers and heated to 300 K, which gas has the greatest internal energy and the molecules of which gas have the highest rms speed?
a. The He has the greatest internal energy, and the Rn has the greatest rms speed. b. The Rn has the greatest internal energy, and the He has the greatest rms speed. c. All the gases have the same internal energy, and the Rn has the greatest rms speed. d. All the gases have the same internal energy, and the He has the greatest rms speed.