Briefly explain Earth's moon
What will be an ideal response?
You could visit two kinds of terrain on the Moon. The dark gray areas visible from Earth are the smooth lunar lowlands which astronomers named maria, drawing on the Latin word for seas. You could also visit the lighter-colored mountainous lunar highlands. The Moon looks quite bright in the night sky seen from Earth. In fact, the albedo of the near side of the Moon is only 0.12, meaning it reflects only 12 percent of the light that hits it. The Moon looks bright only in contrast to the night sky. In reality, it is a dark gray world.
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What does the phenomenon of interference demonstrate?
A) the wave nature of light B) the polarization of light waves C) the quantization of the atomic orbitals D) the particle nature of the photon E) the process of ionization
Equipotentials are lines along which
a. the electric field is constant in magnitude and direction. b. the electric charge is constant in magnitude and direction. c. maximum work against electrical forces is required to move a charge at constant speed. d. a charge may be moved at constant speed without work against electrical forces. e. charges move by themselves.
If body P, with a positive charge, is placed in contact with body Q (initially uncharged), what will be the nature of the charge left on Q?
a. must be greater in magnitude than that on P b. must be equal in magnitude to that on P c. must be negative d. must be positive
Most of the energy during the collapse of the iron core of a supergiant star is released in the form of neutrinos—nearly massless subatomic particles that rarely interact with matter. So how is it they can blow away a stars outer shells?
A) Although they rarely interact with matter, the sheer number released during the collapse is enough to move most of the star's mass into surrounding space at incredibly high rates of speed. B) By creating a massive magnetic field that convulses in on itself, ripping away the stars outer shells C) When neutrinos exceed a certain speed, 22,300 km/s, they interact with matter quite effectively. D) By developing a temporary, but relatively strong positive charge