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What is neither a chemical change nor a physical change?
chemical change has aproximatley 6.54444567887 ksm of value in it in the other hand there is 2.1% less value in physical change but according to my calculations if i time something by 45 i can meake 102343+sd* whuch makes it 23454% and the solar addition calculated and times by ^^654 = 742.55555550% acute
What happens to the identity of a substance when it makes a physical change?
there is to types of change to a substance chemical and physical in a physical change the result is a mixture also most times you can change your end result into what you started with e.g.freeze-melt evaporate-condesate
When was chemical change discovered?
This is a very old observation, from the prehistoric times.
Is mealting an example of physical or chemical change?
it is a physical change most of the times because you can get i back into its original form. for ice, or plastic... its physical. but for styrofoam, its a chemical change because you cant get it back.
How are animals harmful?
animals are harmful at times because they can steal your food and carry harmful diseases
Why do physical and chemical change occurs many times in cooking?
because of the mixing of the ingredients or any processes
Is a glass of juice frozen melted and refrozen a chemical or physical change?
physical :D I hope that helps
Why should goggles or protective eyewear be worn at all times when working with chemicals?
When working with chemicals there may be harmful/dangerous stuff in there so if a harmful chemical gets in your eye you will get hurt terribly.
Describe two changes due to the fusion of hydrogen?
This is a nuclear change. The atoms change into helium atoms. The loss of mass in the change convert to energy, thousands of times the amount of energy of a chemical change.
Is tearing of paper a chemical change?
Psychical change because you're not changing the chemical make-up of the piece of paper, just dividing it. Think of it like cutting an apple. You can only cut it so many times before it's a chemical change.
How many times masterbeding in a day is not harmful?
500 times
Is souring milk a physical or chemical change Why or why not?
It's a chemical change. The smell is the giveaway; a smell that wasn't there before is often an indicator of a chemical change. Also, the rate at which the milk sours can be changed by heat. For example, milk in the refrigerator is actually undergoing this souring reaction at all times, but the lower temperature inside the refrigerator slows it down so that it takes many days. But if you leave it outside the refrigerator, it will sour much more quickly - in a matter of hours. An increase in heat, therefore, quickens the reaction rate. This would not be the case in a physical change.
