A steel railroad track has a length of 30.000m when the temperature is `0.0^(@)C`, the ends of the rail are rigidly clamped at `0.0^(@)C` so that expansion is prevented. The thermal stress set up in the rail if its temperature is raised to `40.0^(@)C` is

A steel tape 1m long is correctly calibrated for a temperature of 27^(@)C . The length of a steel rod measured by this tape is found to be 63.0cm on a hot day when the temperature is 45.0^(@)C . What is the acutual length of the steel rod on that day? what is the length of the same steel rod on a day when the temperature is 27.0^(@)C ? coefficient of linear expansion of steel = 1.20xx10^(-5) .^(@)C^(-1) .

An iron wire AB has diameter of 0.6 mm and length 3 m at 0^(@)C . The wire is now stretched between the opposite walls of a brass casing at 0^(@)C . What is the extra tension that will be set up in the wire when the temperature of the system is raised to 40^(@)C ? Givne alpha_("brass")=18xx10^(-6)//K alpha_("iron")=12xx10^(-6)//K Y_("iron")=21xx10^(10)N//m_^(2)

Coefficient of thermal expansion of a wire varies with temperature T as alpha = 1.6 xx 10^(-6) T , where T is temperature in degree Celsius. If the length of wire is 10 m at 0^@C , what is the change in length of wire (in mm), when its temperature is raised to 25^@C ?

A concrete slab has a length of 10 m on a winter night when the temperature is 0^@C . Find the length of the slab on a summer day when the temperature is 35^@C . The coefficient of linear expansion of concrete is 1.0 xx 10^(-5 @) C^(-1) .

The temperature gradient in a rod of 0.5 m length is 80^(@)C//m . It the temperature of hotter end of the rod is 30^(@)C , then the temperature of the cooler end is

A concrete slab has a length of 10 m on a winter night when the temperature is 0^@C . Find the length of the slab on a summer day when the temperature is 35^@C . The coefficient of linear expansion of concrete is 1.0xx10^(-5) C^(-1) .

Which one of the following diagrams represents the most common relationships between temperature and enzyme activity, when the temperature is raised gradually from 0- 80^(@) C?

The gap between any two rails each of length l laid on a railway trach equals x at 27^@C When the temperature rises to 40^@C the gap closes up. The coefficient of linear expansion of the material of the rail is alpha . The length of a rail at 27^@C will be

A carnot engine has an efficiency 0.4. When the temperature of the source is increased by 20^(@)C and the sink is reduced by 20^(@)C, its efficiency is found to increase to 0.5. Calculate the temperature of source and sink.