Which body continually emits electromagnetic waves?
A) the Sun
B) the Earth
C) you and your classmates
D) all of the above
E) none of the above
Answer: D
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Arriving at a conclusion based upon one's observations is known as:
a. inductive reasoning b. deductive reasoning c. critical thinking d. logic e. the scientific method
Capacitors in Combination: A potential difference of V = 100 V is applied across two capacitors in series, as shown in the figure. If C1 = 10.0 ?F and the voltage drop across it is 75 V, what is the capacitance of C2? 
A. 30 ?F B. 2.5 ?F C. 7.5 ?F D. 3.3 ?F
Explain what the granulation of the solar surface is related to
What will be an ideal response?
Approximately how many radioactive atoms are present in a tritium sample with an activity of 0.6 × 10^-6 Ci and a half-life of 12.3 years? (1 Ci = 3.7 × 10^10 decays/s)
a. 4 × 10^10 c. 7 × 10^8 b. 2 × 10^8 d. 1 × 10^13