lab with constant acceleration:
calculate the average velocity of the cart for each fan speed. Round your answers to the nearest tenth.
The cart with Low fan speed has an average velocity of ___ cm/s.
The cart with Medium fan speed has an average velocity of ___ cm/s.
The cart with High fan speed has an average velocity of ___ cm/s.

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.