we did a lab, u dont have to do it to answer the question. we were experimenting the surface tension of water by droppinh drops onto the pennies surface. plzzzzzzzzzzzz answer.
2006-10-18 11:26:31 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
Because the oils, moisture, and/or anything else on your fingers will change the penny's interaction with water. Think about it: If you put two of the same objects in water, but one was covered in oil, wouldn't it interact with the water differently? Being instructed not to touch the surface of the penny is just another way to insure control in your experiment. You could have worn rubber gloves and taken out more of the variable from your fingers. Good Luck in Lab!
2006-10-18 11:35:52 · answer #1 · answered by acdshottie 2 · 1⤊ 0⤋
Because the oils from your skin will get onto the penny and affect the way water hits it. Oil and water do not mix so the oils would repel the water hitting the surface of the penny.
2006-10-18 11:33:30 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Actually, try dipping the pen or a stylus into some type of warm viscous liquid and try again. Usually touchpad work off of a pressure-threshold system. Since a pen or a penny can't gain enough traction against the touchpad by themselves, they usually do not work as styluses.
2016-05-22 00:38:14 · answer #3 · answered by Anonymous · 0⤊ 0⤋