A time-lapse video of an mysterious optical phenomenon captured by Eric Sterman is certain to leave his fellow photographers green with envy. Sterman was making a video of a Hawaii sunset on the north shore of Oahu about two weeks ago when his Panasonic GH4 camera caught a rare green flash. The time-lapse footage depicts the sun descending from a bank of dark clouds and gradually dipping into the ocean as a pod of whales jump out of the water.
The use of vinegar and salt to clean pennies goes way back. It works on the same principle as using ketchup (Ketchup contains vinegar, salt and tomatoes), but there is less rubbing involved. Mix up a concoction of vinegar and salt. Stir it around to dissolve the salt and then dump in your dirty pennies.
Using Vinegar and Salt. 1. Put 1 tsp (5 g) of salt into 1/4 c (2 oz) of vinegar. For many pennies, one tablespoon (15 g) of salt in 1/2 cup (4 oz) of vinegar will get the job done. Stir the mixture to dissolve the salt. If you don't have vinegar, use lemon or even orange juice. Copper oxide (the gunk on your pennies) dissolves in weak acid, and that's just what all three of these liquids are.