In a laboratory experiment, you are given two unknown substances and a laser. One of the substances is a liquid in which you place the laser. The other is a tank made of a transparent solid. You aim the laser downward at the tank bottom – and find that the reflected ray is fully polarized when the angle of incidence is 54o. What is the transmitted angle for the ray transmitted into the tank bottom?
A. 
B. 
C. can’t answer this without knowing the indices of refraction.
D. 
D.
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Refer to the figure above. What can you conclude from the data shown on this graph alone?
A) The carbon dioxide concentration varies naturally, but is much higher today than it has been in the past 800,000 years. B) Human activity has caused the carbon dioxide concentration to rise and fall many times in the past 800,000 years. C) Changes in the carbon dioxide concentration are the causes of ice ages. D) If current trends continue, carbon dioxide will soon be the most abundant gas in Earth's atmosphere.
About how hot is the core of Earth?
A. 15 million K B. 6,500 K C. 300 K D. 15,000 K
Doubling the temperature of a black body will double the total energy it radiates
Indicate whether the statement is true or false
In an isolated system of two bodies that exert gravitational forces on one another, the quantity (quantities) that remain(s) constant is(are)
A. the total energy of the system. B. the total angular momentum of the system. C. the angular positions of the two bodies. D. all of the above. E. only (a) and (b) above.