Thin Films: Light reflects off the surface of Lake Superior. What phase shift does it undergo?
A. 0°
B. 90°
C. 180°
D. 270°
E. It does not undergo any phase shift.
Answer: C
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For a system undergoing an isothermal process,
a. 
b. 
c. 
d. 
e. 
The density of copper at 293 K is 
and its linear expansion coefficient is
Consider a hot cube of copper that is 1.0cm on a side when its temperature is 1356 K. What is the cube’s mass?
A. 8.80 g B. 8.46 g C. 8.78 g D. 8.38 g E. 8.94 g
The recent modification of the standard Big Bang model is called the ______________ model
Fill in the blank(s) with correct word
A set of twins, Andrea and Courtney, are initially 10 years old. While Courtney remains on Earth, Andrea rides on a space ship which travels away from Earth at a speed of 0.6c for five years (as measured by Courtney),
then turns around and comes back at 0.6c. When Andrea returns, Courtney is 20 years old. How old is Andrea upon her return? A) 10 years B) 12 years C) 15 years D) 18 years E) 20 years