1. On the incomplete ray diagram for an object in front of a curved mirror, trace the path of Ray 1 as you would
do to find the location and size of the image. F labels the focal point of the mirror,
You do not have to trace additional rays for this question.

How is sound energy produced a. vibrating objects b. objects being heated c. temperature differences d. stationary objects

Photons with the highest energy have the longest period

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.