Ten liters per 100 km is about average for a modern car on the highway. For urban driving that figure is excellent.
If the vehicle is running rich, there will be other symptoms. E.g. black smoke at the exhaust, poor drive-ability when hot and it will not pass any emission testing (if applicable to your area)
Changing shirts is a physical change.
Sugar changing to alcohol is a chemical change.
No. It is possible to change direction without changing speed. However, it is not possible to change direction without changing velocity.
Changing from a solid to a liquid is a physical change as is changing from a liquid to a gas.
Changing the shape CAN change the density. If you change it into a smaller shape, then you increase the density. However the mass will not change.
The answer depends entirely on how the dimensions change. It is possible to change the dimensions without changing the perimeter. It is also possible to change the dimensions without changing the area. (And it is possible to change the area without changing the perimeter.)
By changing
the aspect of sound does changing frequency of asuondwave change is tempereture
no you do not have to change the timing chain when changing the water pump.
The Commutative Property of Multiplication states that changing the order of the factors does not change the product
Anything changing to a substance with a different identity is undergoing a chemical change.
physical change