Ashley walks 800 meters along a straight northerly path to school. upon reaching the school building, she realizes she forgot her lunch and runs home (along the same path) to get it. in order to make it back to school on time, she roller-skates back to the school, again along the same path. what distance did ashley travel? 800 meters 1,600 meters 2,400 meters 0 meters

The system is released from rest with the cable taut, and the homogeneous cylinder does not slip on the rough incline. determine the angular acceleration of the cylinder and the minimum coeffi cient s of friction for which the cylinder will not slip.

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 are two examples of phase changes that skip a phase during transition?