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Why penny flattened by a hammer is a physical change?
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 is the Formula to change kg to lb?
2lb = 1kg
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.
What is the formula for the post-1982 penny?
If by formula you mean composition, a post-1982 penny is 97.5% Zinc and 2.5% Copper by mass.
What happens to a penny when it meets Clorox?
the Clorox makes the penny erode and change colors.
What kind of soda changes the color of a penny?
Coke or sprite will change the color of a penny.
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 salt and vinegar removing tarnish from a penny a physical change?
Physical change
Why does ammonia change color if it cleans a penny?
When ammonia cleans a penny, it reacts with the copper oxide layer on the penny's surface. This reaction removes the oxide layer and exposes the shiny copper underneath, causing the penny to appear brighter or even change color.
Is a blackened penny a physical or chemical change?
Chemical
Why does water change the appearance of a penny?
the calcuim diposits into them
Is it a good idea to change the metal used for a penny?
no
Is a copper penny turning dark a chemical change or physical change?
Chemical.
Is cleaning a penny a chemical change or a physical change?
this is my homework just give the answer already!
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.
