How many drops of water can fit on a penny scientific method?
Conclusion: Use your data to answer your experimental question. The results indicate that when you drop water on a penny that the heads side of the penny will hold more drops (heads 23 drops , tails 18 drops ).
Why do so many drops of water fit on a penny?
Because water molecules at the surface of the water puddle attract more to one other than they do to the air molecules above them, they cling together and form a dome shape on the coin . Surface tension prevents the water molecules from falling out and spilling.
What is the world record for drops of water on a penny?
103 drops of water on a penny !
How many drops of rubbing alcohol can fit on a penny?
About 20 to 30 drops of ethyl alcohol can be placed on a coin depending on drop size.
Can a penny hold more drops of plain water or soapy water?
You should find that plain tap water produces a much larger, stable drop of water on top of the penny than the soapy water does . This is because plain tap water has higher surface tension, so the surface is “stronger” and can hold together a larger drop .
What does Penny mean?
Penny as a girl’s name is of English origin and is a short form of Penelope meaning “weaver”.
What happens when you put pennies in water?
Water’s cohesion and surface tension are special because of hydrogen bonds. The cohesion and surface tension of water becomes apparent when the drops of water you add to the penny reach the penny’s edge. Once the water has reached the edge, you begin to see a bubble or dome of water forming on top of the penny .
What happens when you put a coin in water?
Light bends when it passes from one medium ( water ) into another medium of a different density (air). The light bends when it passes from water to air on top of the water . It does the same thing when it passes through the glass, making the coin appear to be closer to you . As a result, you see two images of the coin .
How many drops of water can fit on a 5 cent coin?
Asked how many drops of water will fit on a five cent coin and most people predict two or three. In this surprising activity, students identify the many variables that affect the outcome and discover the answer can exceed forty drops !
Who has the most pennies in the world?
A man from Alabama sets a new record for largest ever single cash-in of pennies totaling $13,084.59. NEW YORK (CNN/Money) – Benjamin Franklin once said a penny saved is a penny earned, but he probably didn’t think of saving over a million of them. But Edmond Knowles did.
What’s inside a penny experiment?
It is solid copper and while any oxidation on the exterior may react with the citric acid in the lemon juice, leaving your old penny bright and shiny, it will remain whole. The post-1982 penny will begin to bubble – a sign of a chemical reaction. Rinse your pennies and let your scientists carefully observe them.
Does water or isopropyl alcohol have a higher surface tension?
Surface Tension of Water (at 20°C) = 72.8 mN/m Surface Tension of Isopropyl Alcohol (at 20°C) = 23.0 mN/m (Note that the actual surface tension of rubbing alcohol will be slightly higher than the value for pure isopropyl alcohol , because rubbing alcohol is 70% isopropyl alcohol and 30% water .) Q9.
How is the shape of a drop of water on a penny different from the shape of a drop of alcohol explain why it’s different?
Though gravity is trying to pull all the water molecules down, toward the surface of the penny , the hydrogen bonds keep the water droplet in a spherical shape . Because alcohol is so much less polar, it can’t resist gravity, and all of the molecules are pulled down into a flat sheet over the penny’s surface.
Which side of a penny holds more water?
The heads side of a penny holds more water than the tails side .