The magnitude of an earthquake, usually expressed by the Richter Scale, is a measure of the amplitude of the seismic waves. The moment magnitude of an earthquake is a measure of the amount of energy released-an amount that can be estimated from seismograph readings.
Remove rust stains from virtually all surfaces you'll find in your bathroom. Restore porcelain bathtubs and sinks to their original condition, plus keep your toilet rust-free by using Iron Out Automatic Toilet Bowl Cleaner. Toilet Bowl and Water Tank Rust Stains â Use 1/2 cup (125 ml).
Use a potato. The oxalic acid in potatoes helps remove the buildup of rust. This method is especially useful for smaller rusted items, such as knives. There are two ways you can use a potato to remove rust: Simply stab the knife into potato and wait a day or overnight.