Actually itz just a temporary physical change.........as u dont add on subtract anything frm the magnet exept heat.....,heat does not effect chemical properties of an iron magnet..
Heating a bar magnet is a physical change because the magnet does not undergo a chemical reaction. The heat energy causes the atoms in the magnet to vibrate, which disrupts the alignment of the magnetic domains within the magnet, thereby reducing its magnetic strength.
physical
Is heating a bar magnet is strongly heated is a chemical change or physical change
Dont know
Yes, making iron into a magnet is a physical change because the internal structure of the iron is altered without changing its chemical composition. By applying a magnetic field, the domains in the iron align to create a magnetic field, making it behave like a magnet.
No, picking up iron filings with a magnet is not a chemical reaction. It is a physical change where the iron filings are being attracted and moved by the magnetic force of the magnet.
Magnetism is a physical property that is mediated by magnetic fields.The magnetic state of a material depends on temperature (and other variables, such as pressure and the applied magnetic field), so a material may exhibit more than one form of magnetism depending on its temperature, etc. However, a material's magnetism doesn't change the composition, and doesn't involve a chemical reaction.
No, magnetization is not a chemical reaction. Magnetic iron and non-magnetic iron are chemically the same substance. Magnetization is a process of alignment of atomic magnetic fields, which is a purely physical change, not a chemical change.
The answer is physical:)
This is not a change at all. However it is physical when you use a magnet to physically seperate (by manetic force) .
It is a physical process. Not really a change of any kind.
Dont know
Yes, making iron into a magnet is a physical change because the internal structure of the iron is altered without changing its chemical composition. By applying a magnetic field, the domains in the iron align to create a magnetic field, making it behave like a magnet.
Magnetic erasing of a computer disk is a physical change. The polarity of the molecules in the storage media is altered, but the material retains the same composition so it is NOT a chemical change.
physical, just the aligning of magnetic domains what were previously random in orientation.
Magnetism is a physical property that is mediated by magnetic fields.The magnetic state of a material depends on temperature (and other variables, such as pressure and the applied magnetic field), so a material may exhibit more than one form of magnetism depending on its temperature, etc. However, a material's magnetism doesn't change the composition, and doesn't involve a chemical reaction.
singing
yes because any that you do in magnet it is magnet again'
First of all lets understand Physical & Chemical Change. Physical change can be reversed and the chemical properties of the two states remain the same. Chemical change cannot be reversed and the chemical properties of the two state are entirely different. Now lets get back to the question. Is growing a tree a physical or a chemical change. The growing of a tree requires chemical changes, primarily the conversion of water and carbon dioxide into cellulose and oxygen. So the growth results primarily from chemical changes.
pysical change