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Cohesion
and
Surface Tension
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How is penny drops lab connected to the real world?
This is related to real life because we might have to create something that is involved in this
How can so many drops of water fit on a penny?
It all depends on if you drop the water fast or if you drop it slow. Ideally, everyone performing the experiment would include the following: - distilled waterThere are a lot of factors involved. The cohesion and adhesion ('stickiness') of water molecules can be effected by things like oils (on surface pennies from peoples' skin) and other contaminates on the penny. The size of the dropper or pipette will determine the size of each water droplet - the larger the drop, the fewer number of drops will fit on the penny. The manner in which the water is added to the penny is also a factor. Water has a cohesive nature (the molecules are kind of like magnets and are attracted to one another). Therefore, if the drop from the pipette is allowed to touch the water already on the surface of the penny, the water can be 'pulled' out of the dropper. When this happens, the size (volume) of the drop is not always the same - it could be a very small amount (which will result in a very large number of drops), or a large amount. Soap causes the cohesiveness ('stickiness') of the water molecules to decrease so they are not as strongly attracted to each other. Because of this, when soap is added to the water the number of drops that can be placed on the penny will decrease. The water molecules can't 'stick' together as well, so the water on top of the penny spills off sooner than it would with non-soapy water. Ideally, everyone performing the experiment would include the following: - distilled water (to start with) - same type/size of calibrated dropper/pipette - same date of penny - penny cleaned as thoroughly as possible using same cleaning procedure - same 'dropping' procedure
What variables may play a factor in the amount of drops the penny hold?
Several factors can come into play here.The size of the dropsHow fast the liquid is being droppedWhat type of liquid is being usedThe temperature of the liquidThe termperature of the pennyIf the penny was clean or dirtyThe height the drop falls fromAny of these things can have an effect an expansion of the liquid, surface tension, and splash.
How many drops 1 ml?
16 drops of water or any water soluble substance makes 1 ml
How many drops are there in a quart of water?
One US quart is 18,927 drops.
When was When the Penny Drops created?
When the Penny Drops was created in 2010.
What is the control on the penny water drops experiments?
In this experiment, the control group would be the penny! The independent variable is the substance/water on the penny, and the dependent is how many drops the penny takes.
How surface tension behaves?
for example, if drops of water are placed on the top of a penny, the surface tension is going to hold the drops on top of the penny. when the penny can hold no more, it will all overflow. make sense?
How many drops can you hold on a penny list one uncontrolled variable?
The penny's state of corrosion.
How many drops of water can fit on a penny research paper?
Alot of drops fit because if you keep the surface tension from moving then you could put as much drops as you can.] ==If you put a penny on a flat surface and keep its tension and keep the penny from moving you can put as much drops as you can till it leaks off. You cant put as much as you want cause the penny will overflow. its not a big object?
Science fair project topics?
how many drops of water can a penny hold? topic: crazy penny........
If you were to put little drops of water on a Penny how many would fit on it?
four
Why does your penny hold so many drops?
it is big inside but small out side
What will hold the most drops of liquid on a penny soda water or milk?
milk
What drops the fastest a penny or an eraser?
an eraser. a penny would catch more air under it. no both would drop at same speed
What property of water allowes so many drops of water to stay on a penny?
adhesion
What is the control and independent and dependent variable in the 'how many drops of H2O can fit on a penny'?
The controlled variable is the penny. The independent variable is the water. The dependent variable is the amount of water able to fit on the penny.
