Awooden block is cut into two pieces; one is 3 times heavier than the other. a depression is made in bothpieces; a firecracker is inserted in the depression and the block is reassembled. the reassembled block is placedon a rough surface and the fuse on the firecracker is lit. when the firecracker explodes, the two pieces of theblock slide apart. what is theratioof the distances traveled by each block?

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.