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Light beam dimmer is chemical or physical change?
A beam of light becoming dimmer is a physical change since it is reversible. Recharging its source will make the light beam bright again.
What are five clues you would consider before diciding whether a change you observe is physical or chemical?
The 5 clues to a chemical change are:energy (heat or light) is given off, or heat is absorbedthere is a precipitate (which means a solid has formed at the bottom of a solution)the change is hard to reverse or irreversiblethere are bubbles which means a gas is being releasedthe solution turns a different colourTo be 100% certain that it is a chemical change, at least 2 or 3 of these things must happen.
What is the difference between a ohysical change and a chemical change?
A Physical Change is a change in the form of either gas, liquid, or solid while a chemical change is a change that occurs in the molecule such as the the burning of methane: CH4+2O2-->CO2+2H2O. Indicators of a Chemical reaction are: Heat, Light, pH, Color, Smell, ect. While Physical will be like ice melting into water or water being boiled into steam.
Is production of heat or light physical or chemical change?
i think it would be physical because it is still energy.
Is giving off light a physical or chemical change?
I would think it to be a Physical Change. Not chemical.
Can Heat light or change in odor can indicate a physical change?
Gay
Can heat light or a change in odor indicate a physical change?
Gay
What does not signal a chemical change color change or production of light and heat or production of gas or change in state?
A change in state does not necessarily indicate a chemical change. Melting, freezing, boiling, or condensing of a substance are physical changes that do not involve a change in the chemical composition of the substance.
When does the color change in a leaf indicate physical change and when dos it indicate chemical change?
The color change in a leaf typically indicates a chemical change when it results from the breakdown of chlorophyll and the revealing of other pigments, such as carotenoids and anthocyanins, as the plant prepares for winter. This process involves biochemical reactions that alter the pigments present in the leaf. Conversely, a physical change may be indicated if the color change is due to external factors like exposure to light or temperature without altering the leaf's chemical composition.
Is heat light and change in odor indicate a physical change?
Heat, light, and change in odor can indicate a physical change depending on the context. For example, melting ice into water is a physical change because it does not alter the chemical composition of the substance. However, if a substance undergoes a chemical reaction that results in heat, light, and change in odor, then it would be considered a chemical change.
Is purple color a physical and chemical change?
No, the color purple is a physical property of an object that results from the absorption and reflection of certain wavelengths of light. It is not the result of a physical or chemical change, but rather the interaction of light with the object's molecules.
Is a silver metallic color of sodium metal a physical or chemical change?
The formation of a silver metallic color on sodium metal is a physical change. This change is due to the reflection of light by the metal's surface, and the silver color is a property change and does not involve a change in the chemical composition of the sodium metal.
Is color a chemical or a physical properties?
Color is a physical property.
Is switching a light bulb on a physical or chemical change?
Physical change
When could color change be a result of a physical change?
A color change is only a chemical change if the change is permanent, if the color change is not permanent, then it is likely a physical change. Let's look at Iodine for example (that's pronounced Eye-oh-deen), it is a solid metal that is grayish in color in its solid state, however in its gas state it's a purple or violet color. Once it reverts to its solid state, it turns gray again. This is a PHYSICAL property of Iodine. If the color changed permanently to something else, it would be a chemical change.
Is a light bulb on a chemical or physical change?
Physical change
Why is the changes of color when mixed with water a physical property?
The change of color when a substance is mixed with water is a physical property because it does not alter the chemical composition of the substances involved. It is merely a change in appearance due to the interaction of light with the new mixture. This change can be reversed by separating the substances.
