Name the three main types of active galaxies.
A. Seyfert, radio, and quasar
B. spiral, elliptical, and irregular
C. barred spiral, irregular, and Seyfert
D. old, young, and intermediate
Answer: A
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A 100 kg mass has a density of 2000 
If the volume is decreased by 2% due to compression, then the density is
A. 3,010 
B. 2,940
C. 2,520
D. 2,440
E. 2,040
Electrical current is
A. the same as electrical charge. B. the charge per unit time. C. the product of charge and time. D. the product of charge and potential difference.
The peak of a body's blackbody radiation curve shifts upward as the temperature of the body increases
Indicate whether the statement is true or false
Two ideal parallel-plate capacitors are identical in every respect except that one has twice the plate area of the other. If the smaller capacitor has capacitance C, the larger one has capacitance
A) C/2. B) 4C. C) 2C. D) C.