Explain radiation darkening
What will be an ideal response?
Solar radiation and high-energy particles break up surface molecules, leading to chemical reactions that slowly form a layer of dark, organic material.
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Capacitors in Combination: The network shown is assembled with uncharged capacitors X , Y, and Z, with CX = 4.0 ?F, CY = 3.0 ?F and CZ = 5.0 ?F. The switches S1 and S2 are initially open, and a potential difference Vab = 120 V is applied between points a and b. After the network is assembled, switch S1 is then closed, but switch S2 is kept open. How much energy is finally stored in capacitor X?
A. 29 mJ B. 0.48 mJ C. 0.24 mJ D. 58 mJ E. 0.96 mJ
Resistance
a) is measured in amperes. b) is the opposition to the flow of electric current. c) is the driving force that moves electrons in conductors. d) is not affected by temperature changes.
The slope of a distance vs. time graph is the acceleration
Indicate whether the statement is true or false
In a single electric cord, such as a cord that connects a wall socket with an electric light,
A) there is just one wire, carrying protons into the light bulb. B) there are two wires, one carrying electrons into the light bulb and the other carrying electrons out. C) there are two wires, one carrying protons into the light bulb and the other carrying protons out of the light bulb. D) there is just one wire, carrying electrons into the light bulb. E) there are two wires, both carrying giant pumpkins into the light bulb.