Question 1 1 pts
Which characteristics are necessary for simple harmonic motion? (Check all that apply)
At the equilibrium position, the speed reaches its maximum.
At maximum displacement (amplitude), the restoring force is greatest, and acceleration
reaches maximum.
O The object must be under the influence of a gravitational force.
O The restoring force is proportional to displacement.

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.