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Can Scientists learn about the chemical composition of stars by analyzing the light they transmit.?
Scientists can learn the composition of a star from the amount and types of electromagnetic radiation, including light, that it gives off. Additionally, scientists can determine the rate of nuclear fusion from the amount of light released per unit of time.
In a firework show the fireworks explode giving off heat and light is this a chemical change why?
It is a chemical change because the chemical composition is changed during this reaction.
What is the chemical composition of a flame?
A flame is pure energy so it has no real chemical composition except from the chemical compositions of the oxygen and fuel (usually hydrocarbons) needed for it to burn. A flame requires fuel, oxygen and heat energy, although it gives off light and heat energy as well. The act of burning is reacting the fuel with oxygen in the air but the flame itself has no chemical composition.
How does a chemical change affect the composition of matter?
chemical change = chemical reaction. ( the composition of matter always changes). In a chemical change the matter in one thing changes, for example you will know a chemical change has occurred when the color or odor has changes or when a new gas is given off.
What happens to the composition of a substance during a chemical change?
Atoms are rearranged, heat may be given off, changes in color and odor might occur, or a gas or precipice may be formed. The composition is changed, and the above are signs of a chemical change.
Is sanding rust off a bike a physical or chemical change?
Sanding rust off a bike is a physical change because it does not alter the chemical composition of the rust or the metal underneath. It only changes the physical appearance by removing the rust layer mechanically through abrasion.
A star located off the main sequence indicates what?
A star located off the main sequence indicates that the star is at a different stage in its life cycle. This could be due to factors such as age, mass, or chemical composition. Some common types of stars found off the main sequence include red giants, white dwarfs, and supergiants.
Is the color of aluminum wire physical or chemical?
The color of aluminum wire is a physical property. It is determined by the way light is reflected off the surface of the metal without changing its chemical composition.
Is scraping paint of a door a chemical change?
no. in order for a chemical change to take place the chemical make up of the paint would need to change, such as a color change. when you peel paint off a door you arent changing its chemical state.
Is acid rain dissolving paint off a wall a chemical change?
Yes, acid rain dissolving paint off a wall is a chemical change. This is because the acid in the rain reacts with the molecules in the paint, causing a chemical reaction that breaks down the paint's structure and changes its composition.
Why is it helpful to study the light that comes off stars?
Studying the light coming from stars can provide important information about their composition, temperature, age, and distance from Earth. This data helps astronomers to better understand the properties and behavior of stars, as well as their role in the universe.
Is limestone gives off carbon dioxide when heated physical or chemical?
When limestone is heated, it undergoes a chemical reaction called thermal decomposition, where it breaks down into calcium oxide (quicklime) and carbon dioxide gas. This is a chemical change because the chemical composition of the substance is altered during the process.
