Which of the following research questions would be the most appropriate selection for a student studying the Deepwater Horizon Oil Spill?
A. Does the oil spill indicate that oil drilling should be banned?
B. How has the oil spill impacted wildlife?
C. How will the oil spill affect our future approaches to drilling?
D. What effect has the oil spill had on the population size of turtles in the Atlantic?

The heater element of a 120 v toaster is a 5.4 m length of nichrome wire, whose diameter is 0.48 mm. the resistivity of nichrome at the operating temperature of the toaster is 1.3 × 10-6 ω·m. the toaster is operated at a voltage of 120 v. (a) what is the power drawn by the toaster? (b) if the cost of electricity is 12 ¢ per kilowatt-hour, and it takes 2 minutes to toast bread, how much does it cost for toasted bread? (c) when the heater element is at room temperature, is the resistivity in the nichrome wire greater than, less than, or equal to it’s resistivity when at operating temperature? explain.