Cho 1 số tụ điện giống nhau có cùng điện dung C=3yF. Nêu cách mắc dùng ít tụ nhất đẻ được bộ tụ có điện dung C=5uF

What are chlorofluorocarbons and what impact do they have on the atmosphere?

Avalue that describes how heavy an object is and is related to the force of gravity is

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.