Floods can cause widespread damage. some methods to prevent damages due to floods are stated below. method 1: construct flood control dams. method 2: create flood plains and winding streams. which of these statements best compares the two methods to prevent damages due to floods? method 2 is harder to implement than method 1. method 2 causes less damage to the environment than method 1. method 1 is easier to achieve than method 2. method 1 is less expensive than method 2

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.