A series LR circuit includes a 9.00 V battery, a 30.0 mH inductor, and a resistance of 5.00 
What is the time constant of this circuit?
A. 115 s
B. 170 s
C. 4.20 ms
D. 6.00 ms
E. 8.30 ms
D. 6.00 ms
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An 8000-kg aluminum flagpole 100-m high is heated by the Sun from a temperature of 10°C to 20°C. Find the increase in internal energy (in J) of the aluminum. (The coefficient of linear expansion is 24 × 10^?6 (°C)?1, the density is 2.7 × 10^3 kg/m3, and the specific heat of aluminum is 0.215 cal/g/°C.)
a. 7.2 × 10^5 b. 7.2 × 10^7 c. 7.2 × 10^3 d. 7.2 × 10^1 e. 7.2 × 10^2
Which of the above images represents a solution of the strongest acid (HA)?
A) A B) B C) C D) All of the above are strong acids. E) None of the above are strong acids.
Energy Conservation With Nonconservative Forces: A 7.5-kg otter slides down a hill, starting from rest at the top. The sloping surface of the hill is 8.8 m long, and the top is 6.5 m above the base. If the speed of the otter at the bottom of the hill is 9.2 m/s, how much energy was lost to nonconservative forces on the hill?
Fill in the blank(s) with the appropriate word(s).
G. Easterbrook(25) has said: "The population growth for the next 2 generations is 100 percent cast in stone. Nothing short of world pestilence or a nuclear war can halt population growth for the next 2 generations.
And with the growth in the world's population that is inevitable through the next 2 generations at least, global resource consumption is going to have to rise. That's the only possible moral outcome, so that millions of people don't die in misery. We're going to have to manage a short-term drastic increase in global resource consumption. And the only way we're going to be able to get through the night with that, is with strong environmental regulations and optimism about the success of reform in technology." Agree or disagree with Easterbrook, citing specific reasons.