input question: trowel

output answer: hung from a string can be used as a plumb bob

input question: To clean a penny

output answer: Mix together 1 teaspoon of salt and 1/4 cup white vinegar in a glass or plastic bowl, and stir until the salt is completely dissolved. Place a half dozen old, tarnished pennies into the solution, wait 10-20 seconds, then remove them and place them into a bowl of water. Take them out of the water, dry them on a paper towel and voila, shiny new pennies!

input question: How can I protect trees and bushes from being damaged by weed whackers?

output answer:
Cut the top and bottom off a clear 2-liter soda bottle, then slice this cylinder down the middle. It will curl around the tree, stay in place, and be almost invisible.