Because of ________, the Moon is moving away from the Earth at about 4 centimeters per century
Fill in the blank(s) with correct word
tides
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Consider the first major feature (orderly motions). Which of the following correctly describe patterns of motion in our solar system?
A. Major moons generally have polar orbits, meaning orbits that take them over the north and south poles of the planet they orbit. B. All the planets orbit the Sun in nearly the same plane. C. The outer planets are so large that they nearly collide with each other on each orbit. D. Inner planets orbit the Sun in the opposite direction from the outer planets. E. The Sun and most of the planets rotate in the same direction that the planets orbit. F. Planets have nearly circular orbits.
Energy Levels:Consider the Bohr model for the hydrogen atom. (c = 3.00 × 108 m/s, 1 eV = 1.60 × 10-19 J, h = 6.626 × 10-34 J ? s) (a) How much energy (in eV) is needed to cause a transition of an electron from the second excited state to the third excited state?(b) What wavelength photon just has enough energy to initiate the transition in (a)?
What will be an ideal response?
Two identical rooms, A and B, are sealed except for an open doorway between them. Room A is warmer than B. Which room has the greater number of molecules?
A. Room A B. Room B C. Both have the same number of molecules.
Whereas electric charges can be isolated, magnetic poles
A) can also. B) cannot. C) gather in clusters. D) none of the above