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Is the variable alcohol when using water and alcohol to see how many drops can fit on a penny?
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How do you clean 1818 penny?
To clean any penny, try using ketchup and a toothbrush. After that, make a paste out of baking soda and water then lightly rubbing the penny with your thumb. For even better results, try using an eraser. Any type, it doesn't matter. Your penny should be nice and clean!
How many drops of soapy water fit in a penny?
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
How do you ensure that the final alcohol bath is free of water?
By using anhydrous alcohol in a vacuum flask.
What is the name for the condition that is manipulated by scientists?
The condition that is deliberately changed using the scientific method in a controlled experiment is the independent variable. It can also be called the manipulated variable.
Will using rubbing alcohol to clean your aluminium MacBook Pro damage it?
Isopropyl alcohol is safe for aluminium.
Why does rubbing alcohol clean pennies?
Alcohol has 91% that takes away germs and any other bacteria on the penny. It's a non-abrasive cleanser. While using ethanol will clean surface dirt and oils from a penny, like a solvent, it's actually the innate properties of copper which keep a penny germ free.
How do you solve an or problem if a variable is unrestricted in sign?
Solve the problem using the + sign for the variable. Then solve the problem using the - sign for the variable. Report your answer as the answer that you got using + or the answer that you got using -.
How to display a variable in PHP using echo or print statements?
displaying a variable in php using echo statement? <?php $name="ram"; //declaring and defining the variable echo "$name"; //printing the variable using echo command ?>
What variable do you change when using the scientific method?
The independent variable
Method of using super glue to close open wounds?
Clean the edges of wound with alcohol, press the edges of wound together and apply drops of super glue over the edges.
Make a sentence using hypothesis controlled experiment and variable?
Make a sentence using hypothesis, controlled experiment and variable. Make a sentence using hypothesis, controlled experiment and variable.
A sentence using the word independent variable?
We used 3 kinds of soaps in the experiment, which each was an independent variable.
How many drops of water can a penny hold on its surface?
Water has a surface tension. When dropping water on a penny, people usually underestimate how much water the surface of a penny can hold. The surface tension of water is strong on a smaller surface, and when dropping water on the surface of a penny, towards 20 drops the water on the penny will look like it is bulging out a lot. It really depends, depending on which side of the penny you are using, it ranges from 6 to even 34 drops using a simple eyedropper. Because eyedroppers do not produce the exact same size of drops every time, the result is not very accurate. To be even more accurate, scientists use accurate distributing machines and a very new penny to determine how many drops of water it can hold without vibrations. There could be certain amounts of grime and dirt on a penny, depending on how old it is, which can affect how much water can be put onto it. Different types of water can also change how much a penny can hold. Tap water has certain amounts of chemicals in it, and that could also affect the weight and surface tension of the water on the penny. The height of which the water comes off from matters too, the more force of the water that comes down, the more likely the water on the penny is to splash and spill. The place the water lands on also has an effect on it. To be even more accurate, light has a mass. If light shines directly at the water on a penny, it could push it a tiny bit. This change is impossible to see, and it has basically no effect on the penny or water at all whatsoever. Remember, all tests may not be 100% accurate, and there may always be a chance that there is a better way to make a penny hold more droplets of water than the presumed "most advanced and accurate" way.
What is the name of the variable that describes data using words or numerals as labels?
The variable that describes data using words or numerals as labels is called a categorical variable.
What are some benefits of using eye drops?
Some benefits of using eye drops are prevention of itching and dryness. Eye drops are also used in treatment of different eye problems, such as glaucoma.
Sentence using variable?
I have variable hours of work; today I will leave early.
Does drinking alcohol while using cough drops cause problems?
Apart from messing up your digestion, probably not. However, excessive drinking when you are sick can affect your body's ability to fight off disease.
