Fill in the blanks in the following paragraph to correctly identify the properties of devices that use electromagnetism. (1 point) A(n) changes mechanical energy into . A(n) changes electric energy into . A(n) changes the voltage of an alternating current. A(n) transformer has more loops in the primary coil than in the secondary coil. A(n) transformer has loops in the primary coil than in the secondary coil.

Which of the following harmful chemicals are found in tobacco smoke? a. carbon monoxide b. carbon dioxide c. nicotine b. carbon dioxide d. both a and c

What are the similarities & differences between a thermistor and a light dependent resistor in physics?

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.