Ideal metals form close-packed crystal structures because the positive ______________cores pack like spherical billiard balls.
Fill in the blank(s) with the appropriate word(s).
ion
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Pluto's density is most similar to
A) the terrestrial planets. B) the jovian planets. C) moons of the jovian planets. D) Mercury, but nor Venus, Earth, or Mars. E) Saturn, but not Jupiter, Uranus, or Neptune.
Which of these is a refinement that Niels Bohr made to the Rutherford model of the atom?
A. Electrons orbit about a dense positively charged nucleus. B. Atoms consist of negatively charged electrons and positively charged protons. C. An electron's angular momentum is quantized, but not in integral multiples of ?. D. Electrons can exist only in certain circular orbits about the nucleus.
A ground observer measures the period of a pendulum moving as a part of an inertial frame of reference to be 2.10 s as the inertial frame moves by at a velocity of 0.670 c. What would the observed period be of the same pendulum if its inertial frame were at rest with respect to the observer?
a. 2.83 s b. 1.21 s c. 3.66 s d. 1.56 s e. 3.13 s
Aliens on Krypton build a spacecraft 472. teef long. In their units the speed of light is 22.2 million teef/ces. How fast (teef/ces) must it travel to appear to be 66.6 teefs long?
What will be an ideal response?