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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 else can I help you with?
Is the variable alcohol when using water and alcohol to see how many drops can fit on a penny?
Yes, in this experiment, the variable "alcohol" refers to the liquid being tested to see how many drops can fit on a penny. By changing the type of alcohol used, you can observe how it affects the number of drops that can fit on the penny due to variations in surface tension and viscosity.
In what way does cohesion play a part in how many drops of water can be dropped onto the head side of a penny?
Cohesion is the attraction between water molecules that allows them to stick together. This cohesion enables the water drops to pile up on top of each other on the head side of a penny without spilling over the edge. The surface tension created by cohesion allows the drops to form a dome shape on the penny before spilling.
How many milligrams in 20 drops of water?
There are roughly 100 milligrams in 20 drops of water.
How many drops of water make 11 ml?
11mL is 220 drops (20 drops per mL).
How many drops in one pound?
There are approximately 29,573.5 drops in one pound of water.
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.
What property of water allowes so many drops of water to stay on a penny?
adhesion
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
How many drops of water can fit on a US penny?
Approximately 30 to 35 drops of water can fit on a US penny before spilling over. The surface tension of the water allows it to form a dome-like shape on top of the penny, holding more drops than you might expect.
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.
Why can many drops of water be put on the surface of a penny without spilling over the sides?
The surface tension of water allows many drops to sit on a penny without spilling over the sides. The cohesive forces between water molecules create a strong bond, which enables the water to form a dome-like shape on the penny. This dome shape prevents the water from overflowing.
Is the variable alcohol when using water and alcohol to see how many drops can fit on a penny?
Yes, in this experiment, the variable "alcohol" refers to the liquid being tested to see how many drops can fit on a penny. By changing the type of alcohol used, you can observe how it affects the number of drops that can fit on the penny due to variations in surface tension and viscosity.
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?
In what way does cohesion play a part in how many drops of water can be dropped onto the head side of a penny?
Cohesion is the attraction between water molecules that allows them to stick together. This cohesion enables the water drops to pile up on top of each other on the head side of a penny without spilling over the edge. The surface tension created by cohesion allows the drops to form a dome shape on the penny before spilling.
How many drops can you hold on a penny list one uncontrolled variable?
The penny's state of corrosion.
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
