You will see that it has begun to melt.
In a physical change, the substance's chemical properties remain the same even though its appearance or state may have changed. Signs of a physical change can include changes in shape, size, or phase (solid, liquid, gas) without altering the chemical composition of the substance.
If a scalar, it is the change in distance.
The physical quantity given by the slope of a velocity-time graph is acceleration. This is because the slope represents the rate of change of velocity over time, which is how acceleration is defined (acceleration = change in velocity / time taken).
endothermic change
To calculate acceleration, you need to know the change in velocity (final velocity - initial velocity) and the time taken for that change to occur. Acceleration = (Change in velocity) / (Time taken).
Physical change.
Physical. It is a mixture of salt and water. No chemical change has taken place.
hydrogen and oxygen gas are given off
Yes. No chemical change has taken place, only a physical change. It can be undone (liquid water can be re-frozen)
Slicing turkey represents a physical change, not a chemical change. The chemical composition of the sliced turkey is identical to the chemical composition of the intact turkey. Only a physical change has taken place.
A chemical change has taken place. The exposure to sunlight causes the paper to undergo a chemical reaction, breaking down the molecules in the paper and causing the color change to occur.
Changes such as a change in state (solid to liquid), change in color, change in odor, change in solubility, or change in temperature do not provide direct evidence that a chemical reaction has occurred. These changes can be indicative of a physical change rather than a chemical change. To confirm a chemical reaction, additional evidence such as the formation of new substances, evolution of gas, or consumption of reactants is necessary.
Yes, A physical change has taken place. The water has evaporated and left the sugar. Neither substance has changed its identity. GOOD LUCK ON YOUR TEST!
That is a physical change. The is no chemical change that takes place when you sharpen your pencil in a standard manner. I suppose if you sharpen it extremely fast, you could catch the pencil on fire, which would then be a chemical change.
Signs that a chemical change has taken place include the formation of a gas, the formation of a precipitate, a change in temperature, and a change in color.
no because all you are doing is changing the shape and form
When water changes to water vapor, it has changed its state from liquid to vapor and no chemical change has taken place. It's only a physical change.