Download qwk4

Pop-quiz #1
Which of the following statements is TRUE:
A. Einstein first postulated the constancy of the speed
of light with his general theory of relativity
B. The equivalence of mass and energy is best
expressed through the formula: E = mc2
C. Gravitational redshift is a feature of the special
theory of relativity
D. The principle of equivalence which equates gravity
to an accelerated frame of reference is the basis of
the special theory of relativity
Pop-quiz #2
Which of the following statements is FALSE:
A. Wien’s law states that the temperature of a black
body and the wavelength of peak radiation bear an
inverse relation to each other
B. The luminosity of a black body is proportional to
its temperature raised to the fourth power
C. Atoms are capable of absorbing and re-emitting
photons
D. The energy of a photon is given by the formula:
E = mc2
Pop-quiz #3
Which of the following statements most accurately
describes what happens when a star evolves from
LEFT to RIGHT along a HORIZONTAL LINE
in a HERTZSPRUNG-RUSSELL DIAGRAM:
A.
B.
C.
D.
It’s temperature and radius both increase
It’s temperature increases, but it’s radius decreases
It’s temperature decreases, but it’s radius increases
It’s temperature and radius both decrease
Pop-quiz #4
Which of the following statements most accurately
describes what happens when I HOLD A PIECE
OF CHALK IN MY HAND:
A. A gravitational force and an electromagnetic force
are canceling each other
B. Only a gravitational force is acting on the piece of
chalk
C. Only an electromagnetic force is acting on the
piece of chalk
D. A gravitational force and a strong nuclear force are
canceling each other
Pop-quiz #5
Which of the following statements comparing our Sun
to another star X located at the outer edge of the
Milky Way galaxy is TRUE:
A. They have the same orbital period around the
center of our Galaxy
B. Star X takes a longer time than the Sun to orbit the
Galaxy’s center
C. The Sun takes a longer time than Star X to orbit the
Galaxy’s center
D. Star X and the Sun are at the same distance from
the center of the Milky Way