What elements are in the supernova remnant?
A.) Oxygen.
B.) Sulfur.
C.) Hydrogen.
D.) Nitrogen.
E.) All of the above.
Ans: E.) All of the above.
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Phase Angles: The phase angle of a series RL ac circuit with a 20.0-mH inductor and a certain resistor at 1000 Hz is 20.0°. What is the resistance in this circuit?
A. 145 ? B. 100 ? C. 245 ? D. 200 ? E. 345 ?
Which of the following characteristics describes silicate minerals?
-Silicate minerals contain only silicon. -Silicate minerals make up 8 percent of Earth's crust. -Silicate minerals contain calcite and dolomite. -Silicate minerals contain halite and gypsum. -Silicate minerals contain silicon and oxygen.
Which of the following is a period of the Cenozoic era?
a. Eocene b. Quaternary c. Cretaceous d. Cambrian
A DC current of size 10 A flows through one coil of a transformer. What is the current flowing through the other coil of the transformer if that second coil has ten times as many loops as the first?
a. 0 A b. 1.0 A c. 10 A d. 100 A e. 1000 A