Problem and Solution :Thermal expansion part-1

Problem

A freeway of concrete made ​​from scrap pieces of length 14 m ( 20 degrees Celsius ) . How wide the range expansion ( at 20 degrees Celsius ) to be made between the cut pieces to prevent the arch if the temperature range is -30 degrees to +50 degrees ?

Solution

 

Problem

Super Invar is an alloy of iron and nickel , is a strong material with a thermal expansion coefficient is very low ( 0.2 x 10 ^ -6 per degree Celsius ) . The top of the table is 2 m in length made ​​of this alloy is used for the sensitive laser measurement which required a very high tolerance . How big is this mixture will expand along its length if the temperature increase of 5 degrees Celsius ?

Solution

 

Problem

To be more powerful , larger spikes of the hole are often used and nails then cooled ( usually in dry ice ) before it is placed in the hole . A 1,871 -diameter steel nails will be placed in a hole with a diameter of 1.869 cm . To a temperature of how many nails must be cooled in order to get into the hole ( pa 20 degrees Celsius ) ?

Solution

Tweet