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Is dissolving salt in water a a chemical change or a physical change?
It is a physical change as it can be "undone" by evaporating the water. An simple example of a chemical change is baking a cake, you can't un-bake a cake. To work out whether it is a chemical or physical change just think whether it can be undone or not.
Which city hosted the 2009 UN climate change conference?
denmark
Why the rusting of an iron pole is not physical change?
The rusting of an iron pole is a chemical change. An example of a chemical change would be crumbling a piece of paper. When you are crumbling this piece of paper, the contents of the paper have not change and you are able to uncrumble the paper there is no difference except the paper has wrinkles. :) However in an example of chemical change like a metal rusting, you cannot un-rust it, it was chemically changed. Another example of a chemical change would be burning a piece of paper to ashes.
Why the rusting of an iron pole is not a physical change?
The rusting of an iron pole is a chemical change. An example of a chemical change would be crumbling a piece of paper. When you are crumbling this piece of paper, the contents of the paper have not change and you are able to uncrumble the paper there is no difference except the paper has wrinkles. :) However in an example of chemical change like a metal rusting, you cannot un-rust it, it was chemically changed. Another example of a chemical change would be burning a piece of paper to ashes.
Is a melting ice lolly a chemical reaction?
No ice- cream melting is not a chemical reaction, because with a chemical reaction it is hard to get back the original form. But with ice cream melting that is a physical change because you can easily freeze the ice cream again and get it back to normal un-melted ice cream.
Is dissolving salt in water a a chemical change or a physical change?
It is a physical change as it can be "undone" by evaporating the water. An simple example of a chemical change is baking a cake, you can't un-bake a cake. To work out whether it is a chemical or physical change just think whether it can be undone or not.
How do you re zip a protocol suitcase liner?
If you mean UN ZIP the liner-- the answer is push the zipper back and then cut the threads that have been sewn over the teeth that prevent the zipper from unzipping.
Is corrosiveness a physical change or a chemical change?
Corrosion represents a CHEMICAL change.
Isdissolving sugar in a cup of tea physical change or chemical reaction?
its as physical change as no reaction takes place. the sugar fills in the gaps between the water molecules so you cant see it un till you filter or dissolve the coffee.
Is burning a marshmallow a chemical change?
It is easier in this case to say why it isn't a physical change. As you cannot turn a roasted marshmallow back into an un-roasted one, A chemical reaction must have occurred. Cooking is normally a chemical change as you cannot un-cook something.
Is cooking egg a physical change?
Cooking an egg is a chemical change because the proteins in the egg become denatured through exposure to heat. There is also a physical change because the denaturing of the proteins causes them to become solid at room temperature.
Is shaking up salad dressing and sewing an apron a physical change?
No. They aren't even a mixture, since they don't mix. When properly shaken prior to serving, an oil & vinegar dressing is a "suspension"; droplets of each all next to each other, but still separate. If you leave the bottle standing for a few minutes, the vinegar (which is mostly water) will sink to the bottom and the oil will float to the top.
Is baking a cake batter a chemical or physical change?
Baking a cake is a chemical property because it is going from dough to cake or batter to cake.
Example of a physical rather than a chemicalchange?
Which of the following is an example of a physical rather then a chemical change? Which of the following is an example of a physical rather then a chemical change?
What is the meaning of physical component?
Anu nga un
Is breaking glass a chemical change or physical change?
Purely physical.
What is physical stigmata?
que es un estigma fisico
