Physical. The glass expands or contracts depending on temperature, when you put a hot glass into cold water part of the glass cools and contracts while some of it is still in it's hot, expanded state.
It is a physical change because the chemical composition of the glass does not change.
This is a chemical change.
It does but it is Not a chemical change its physical change...
The swelling and bursting of a red blood cell placed in distilled water is a physical change. This is because the cell's structure is altered due to the osmotic pressure causing water to move into the cell, leading to swelling and ultimately bursting. No new substances are formed in this process.
When ice melts and becomes a liquid it is a physical change. When the liquid boils and becomes gaseous it is a physical change. It is a chemical change when the molecular structure has been changed in some way, here it has not.
It is a physical change because the chemical composition of the glass does not change.
it is a physical change because the state of the glass does not change.it cracks because of the rapid change of temperature
This is a chemical change.
Buoyancy is a physical change, not a chemical change. It results from the relationship between an object's density and the density of the fluid it is placed in, causing the object to either float or sink.
It does but it is Not a chemical change its physical change...
The swelling and bursting of a red blood cell placed in distilled water is a physical change. This is because the cell's structure is altered due to the osmotic pressure causing water to move into the cell, leading to swelling and ultimately bursting. No new substances are formed in this process.
It is physical because the object doesn't chemical change . the object just pushes upward in water of liquid and gas( air) on an object placed in it.
It is physical because the object doesn't chemical change . the object just pushes upward in water of liquid and gas( air) on an object placed in it.
Sharpening a pencil is a physical change, because there is no change to the chemical makeup of the pencil when sharpening it. It is simply chunks of wood being sliced off to reveal more of the lead.It is a physical change.
A chemical change occurs. When aluminum foil is placed in liquid bromine, the aluminum reacts with bromine to form aluminum bromide, which appears as a white solid. This reaction is a chemical change because the composition of the substances involved is altered.
When ice melts and becomes a liquid it is a physical change. When the liquid boils and becomes gaseous it is a physical change. It is a chemical change when the molecular structure has been changed in some way, here it has not.
This is a chemical change. When sodium reacts with water, it undergoes a chemical reaction to produce hydrogen gas and sodium hydroxide. The formation of new substances (sodium hydroxide) and the evolution of gas (hydrogen) indicate a chemical change rather than a physical one.