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It is a physical change, because it does not change in substance. A penny, whether in its normal state or flattened, is still a penny. Similarly, if you drop a watermelon and it breaks apart, that is also considered to be a physical change because it is still a watermelon.
Things are considered to be chemical changes when the substance changes into something new, and is commonly classified as irreversible. When an object rusts, it is considered to be a chemical change. Chemical changes are associated with a temperature change, or a color change or bubbling or something of the sort. Physical changes deal with physical changes in state, for example, ice melting, or in the example you provided, a penny being flattened.
What else can I help you with?
Why did the penny formula change?
cause the value of the penny was more then wat it was worth
What is a good title for penny experiment?
A good title for a penny experiment could be "Penny Power: Exploring the Science of Surface Tension." This title highlights the focus on the physical properties of pennies while hinting at an engaging scientific investigation. It invites curiosity and suggests a hands-on exploration of the principles at play.
What is a sentence for penny?
100 penny makes a dollar. Every penny counts, my friend!
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 happens if you eat a penny?
You pass a penny.You pass a penny.
Is salt and vinegar removing tarnish from a penny a physical change?
Physical change
Is a blackened penny a physical or chemical change?
Chemical
Is putting a penny in lemon juice a physical or chemical change?
Putting a penny in lemon juice would cause a chemical change because the lemon juice reacts with the copper in the penny to create copper oxide, which changes the chemical composition of the penny.
Is cleaning a penny a chemical change or a physical change?
this is my homework just give the answer already!
Is dropping a penny into a glass of water a physical change?
Yes
Why does a penny rust faster in coca cola?
Sugar reaches the copper and they form a physical change
Is salt and vinegar removing tarnish from a penny physical or a chemical change?
Removing tarnish from a penny with salt and vinegar is a chemical change. The reaction between the salt, vinegar, and tarnish on the penny results in the formation of new substances that remove the tarnish.
Is a copper penny turning dark a chemical change or physical change?
Chemical.
How big will a british penny be if flattened?
It would depend on how enthusiastically you flattened it. Like a jeweller hammering out gold leaf, you could probably make it about a quarter the size of a tennis court if you had sufficient patience and skill.
Is cleaning a penny with vinegar and salt a physical or chemical change?
Cleaning a penny with vinegar and salt is a chemical change. The vinegar (acetic acid) reacts with the salt (sodium chloride) to form a chemical compound that removes the tarnish on the copper surface of the penny. This reaction changes the composition of the penny's surface, making it appear shiny and clean.
What are the release dates for Mike Hammer Private Eye - 1997 A Penny Saved 1-9?
Mike Hammer Private Eye - 1997 A Penny Saved 1-9 was released on: USA: 23 November 1997
When a shiny penny turns dull is this a physical or chemical change?
It depends how you mean dull. Dull by wear or dull by oxidation? If it just becomes dull without being touched, then it is a chemical change. Metals readily react with non metals ie Oxygen. This will form a metal oxide layer on the exposed regions. This is why you need to sandpaper down some of the more reactive metals, when using them for conductivity experiments in school, as the oxide reduces conductivity.
