Does the co-efficient of linear expansion depend on the scale of temperature and unit of length?

Define co-efficient of linear expansion.Dose it depend on unit of length?

What is the unit of co-efficient of linear expansion.

On what does the efficiency of a heat engine depends ?

A metal and is heated till its length becomes twice of its original length. If coefficient of linear exansion of the material of the rod is alpha , then what is the change in temperature?

What are the co-efficient of expansion of solid? How are they related?

How does the velocity of sound depend upon pressure and temperature of the medium.

A large steel wheel is to be fitted on to a shaft of the same material. At 27 ^@C , the outer diameter of the shaft is 8.70 cm and the diameter of the central hole in the wheel is 8.69 cm. The shaft is cooled using ‘dry ice’. At what temperature of the shaft does the wheel slip on the shaft? Assume coefficient of linear expansion of the steel to be constant over the required temperature range: a_ steel = 1.20 xx 10^-5K^-1 .

Does the focal length of a lens depends on the medium in which it is immersed ?

Define co-efficient of linear,superficial and volume expansions.

The co-efficient of line expansion brass is 2*10^-5°C^-1 , By how much the temperature of a brass rod be increased so as increase its length by 4%.