Correct answer only ! what do we call the principal si units that are used to derive all other si units? a. si units b. derived units c. lowest units d. base units

Which of the following is not a transverse wave? a) soundb) lightc) radiod) all of thesee) none of these

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.

What is part of a line has one endpoint and continues in one direction?