An object is 12.0 cm from the surface of a spherical Christmas tree ornament that is 10.0 cm in diameter. What is the magnification of the image?
a. -0.500
c. +0.172
b. -0.200
d. +0.143
C
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Consider the sequence of SG devices shown in figure Q7.7. Which of the expressions below gives the proper quantum amplitude that an electron emerging from the first SG device leaves via the - channel of the final device? (Do not assume that the inner product is commutative.) 
A. 
B. 
C. 
D. 
E. None of the above
A resistor and an ideal inductor are connected in series to an ideal battery having a constant terminal voltage V0. At the moment contact is made with the battery,
(a) the voltage across the resistor is A) V0. B) V0/e. C) V0/2. D) zero. (b) the voltage across the inductor is A) V0. B) V0/e. C) V0/2. D) zero. What will be an ideal response?
All the chemical energy in food is converted into running the body's metabolism
What will be an ideal response?
How does a gas cloud become hot?
What will be an ideal response?