What best completes the statement or answers the question. 1. (T4) A permanent magnet sticks motionlessly to the steel front of your refrigerator. Why does this
happen?
A. The permanent magnet aligns the magnetic domains in the steel so that they
attract the poles of the permanent magnet.
B. The permanent magnet attracts isolated magnetic poles (also known as
monopoles) in the steel toward the surface of the steel, where they bind strongly
to the poles of the permanent magnet.
C. The permanent magnet shifts the electrons and protons in the steel slightly
apart, so that a magnetic polarization occurs.
D. The permanent magnet causes currents to flow in theusteel, making the steel
magnetic so that it attracts the poles of the permanent magnet.
2. (T6) Which diagram shows the magnetic field between the north poles of two magnets that are
near each other?

Comedians like to joke that the reason we haven’t been visited by intelligent life from elsewhere in the universe is that aliens have been monitoring earth’s broadcasts of intellectually embarrassing tv programs, like gilligan’s island, fear factor, the jersey shore, and the jerry springer showand so consider us far too primitive to merit a visit. let’s check the assertion that aliens could have been receiving them. tv programs are broadcast at a frequency of about 100mhz with about 100kw of total power in 30frames per second, which emanatesroughly uniformly in all directions. assume that interstellar space transmits these broadcasts without attenuation. no matter how smart they are, aliens would require at least one photon per frame to interpret our signals. findthe number of photons per unit time per unit area reaching a receiver on a possible planet in the nearest star system, which is about 4 light-years away (a light-year is the distance light travels in a year). if aliens aimed a receiver or detector directly at earth, how big (in diameter) would it have to be to receive a photon per frame

What is a possible result of higher air temperature caused by global warming

Because atoms of elements in the same group of thbecause atoms of elements in the same group of the periodic table have the same number of neutrons, they have similar properties. select the best answer from the choices provided t fe periodic table have the same number of neutrons, they have similar properties. select the best answer from the choices provided t f