A 120-V rms voltage at 60 Hz is applied across an RC circuit. The rms value of the current in the circuit is 0.60 A and it leads the voltage by 60°. What is the value of the capacitance in this circuit?
A) 13 ?F
B) 14 ?F
C) 15 ?F
D) 16 ?F
E) 17 ?F
C
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When the equation Ga + Br2 ? GaBr3 is balanced, the total of all the coefficients (both written and "understood") is
a. 4. b. 3. c. 6. d. 7.
The electric force between charges depends on the
A) magnitude of electric charges. B) separation distance between electric charges. C) both of these D) none of the above
If a certain sample of an ideal gas has a temperature of 104°C and exerts a pressure of 2.3 × 104 Pa on the walls of its container,
how many gas molecules are present in each cubic centimeter of volume? The ideal gas constant is R = 8.31 J/mol × K and Avogadro's number is NA = 6.022 × 1023 molecules/mol.
In powder fabrication of metals and ceramics, when the pressed powder part is sintered, the powder particles bond to each other, and voids are reduced by the ___________of atoms.
Fill in the blank(s) with the appropriate word(s).