What is the percentage change in length of 4m iron rod if its temperature changes by `200^(@)C.`
`alpha_(iron)` = `2times10^(-5)`/`.^(∘)C`

What is the percentage change in length of 1m iron rod it its temperature changes by 100^(@)C. alpha for iron is 2 xx 10^(-5)//"^(@)C .

To increase the length of brass rod by 2% its temperature should increase by (alpha = 0.00002 "^(@)C^(-1))

An iron sphere has a radius of 10 cm at a temperature of 0^(@)C . Calculate the change in volume of the sphere if it is heated to 100^(@)C . Given alpha_(Fe) = 1.1 xx 10^(-6).^(@)C^(-1)

An iron sphere has a radius 8 cm at a temperature of 0^(@)C . Calculate the change in volume of the sphere if is temperature is raised to 80^(@)C . Coefficient of liner expansion of iron =11xx10^(-6) .^(@)C^(-1) .

Consider a metal scale of length 30cm and an object. The scale is calibrated for temp 20^(@)C . (a) What is the actual length of division which is shown as 1cm by scale at 40^(@)C . Given alpha_(s) = 2 xx 10^(-5)//"^(@)C . (b) What will be the reading of scale at 40^(@)C if the actual length of objects is 10cm . (c ) What will be the actual length of object at 40^(@)C if is measured length is 10cm . (d) What is % error in measurement for part (b) and (c). (e) If the linear expansion coefficient of object is alpha_(0) = 4 xx 10^(-5) and neglecting the expansion of scale, then answers of (b) and (c) parts. (f) If alpha_(0) = 4 xx 10^(-5) and alpha_(s) =2xx 10^(-5) then find answers of (b) and (c) part.

An iron sphere has a radius of 10 cm at a temperature of 0^(@)C . Calculate the change in the volume of the sphere, if it is heated to 100^(@)C . Coefficient of linear expansion of iron = 11 xx 10^(-6).^(@)C^(-1) .

A carbon and an aluminimum wire are connected in series.If the combination has resistance of 27 ohm at 0^(@)C ,what is the resistance of each wire at 0^(@)C so that the resistance of the combination does not change with temperature ? [alpha_(C ) = -0.5 xx 10^(-3)(.^@C)^(-1) and alpha_(A) = 4 xx 10^(-3)(.^@C)^-1] .

Calculate the percentage increase in the moment of inertia of a ring of iron. Given that alpha_("iron")=11xx10^(-6).^(@)C^(-1) and rise in temperature is 20^(@)C