How can a wave carry information? A. The transmitter changes the form of the wave. The receiver then decodes the changes that have been made to the wave.

B. The transmitter changes the angle in which the wave is sent. The receiver detects the changes in the angle and decodes them.

C. The transmitter changes the wave type between mechanical and electromagnetic. The receiver detects and decodes these switches.

D. The transmitter sends a wave. The receiver reflects this wave. The transmitter then decodes the changes made to the wave.

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.