Process of Science: Give examples of how we build upon our knowledge of stars to measure distances to the edge of the Universe
What will be an ideal response?
We use established theories for stellar evolution such as Cepheid variables, and the Chandrasekhar limit for white dwarf masses as critical steps on the distance ladder.
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A ball is subjected to a pressure of 25.0 atmospheres. The un-squeezed diameter of the ball is 4.00 cm. The squeezed diameter of the ball is 3.99 cm. The bulk strain on the ball is
a. 
b. 
c. 
d. 
e. 
A coil of 160 turns and area 0.20 m2 is placed with its axis parallel to a magnetic field of initial magnitude 0.40 T
The magnetic field changes uniformly from 0.40 T in the +x direction to 0.40 T in the -x direction in 2.0 s. If the resistance of the coil is 16 ?, at what rate is power generated in the coil? A) 5.0 W B) 10 W C) 15 W D) 20 W E) 25 W
If in a double-slit experiment the distance to the screen is increased, which of the following happens to the interference pattern shown on the screen?
A) The minima get closer together. B) The maxima stay at the same position. C) The minima and maxima stay at the same position. D) The maxima get further apart. E) The minima stay at the same position.
General Questions: In order to get an object moving, you must push harder on it than it pushes back on you.
A. True B. False