Why do compasses point north?
a. Because the Coriolis force tends to force to point to the North Pole.
b. Because Earth is a magnet with a magnetic north pole near the geographic North Pole.
c. Because Earth is a magnet with a magnetic south pole near the geographic North Pole.
d. Because the Earth is unmagnetized but its atmosphere is magnetic, especially near the North Pole.
e. Because the Coriolis force deflects magnetic field lines to the right.
c
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What is gravitational lensing?
A. the temporary disappearance of a star as an object passes in front of it B. the use of Earth's gravity to shape lenses during grinding C. the focusing and brightening of starlight by the gravitational field of a foreground object D. the use of small telescopes to enhance the brightness of stars
Why is Hubble's Law called the top of the distance ladder?
What will be an ideal response?
What do we mean by the spin of a subatomic particle?
A) It describes how fast the particle is rotating on its axis at a given time—if more torque is applied, the particle spins faster. B) It is one of the basic properties of any particle, and is a measure of the particle's angular momentum. C) It is a measure of the particle's electrical charge. D) The spin of a particle describes how the story of the particle is portrayed to journalists.
Consider the appearance of an American flag submerged deep in water. The white stars and red stripes appear
A) cyan and red. B) cyan and blue. C) red and black. D) cyan and black.