The brass scale of a barometer gives correct reading at `10^(@)C`. The baometer reads `75 cm` at `30^(@)C`. What is the a atmoshpheric pressure at `o^(@)C ("in cm "Hg)`
`(alpha_("brass")=20xx10^(-6)//^(0)C,lambda_(Hg)=175xx10^(-6)//^(@)C)`

(a) The brass scale of a barometer gives correct reading at 0^(@)C . Coefficient of linear expansion of brass is 2.0xx10^(-5)//^(@)C . The barometer reads 75cm at 27^(@)C . What is the atmospheric pressure at 27^(@)C ? (b) A barometer reads 75.0cm on a steel scale. The room temperature is 30^(@)C . The scale is correctly graduated for 0^(@)C . The coefficient of linear expansion of steel is alpha=1.2xx10^(-5)//^(@)C and the coefficient of volume expansion of mercury is gamma=1.8xx10^(-4)//^(@)C . Find the correct atmospheric pressure.

(a) The brass scale of a barometer gives correct reading at 0^(@)C . Coefficient of linear expansion of brass is 2.0xx10^(-5)//^(@)C . The barometer reads 75cm at 27^(@)C . What is the atmospheric pressure at 27^(@)C ? (b) A barometer reads 75.0cm on a steel scale. The room temperature is 30^(@)C . The scale is correctly graduated for 0^(@)C . The coefficient of linear expansion of steel is alpha=1.2xx10^(-5)//^(@)C and the coefficient of volume expansion of mercury is gamma=1.8xx10^(-4)//^(@)C . Find the correct atmospheric pressure.

The height of the mercury column in a barometer provided with a brass scale corrercted at 0^(0)C is observed to be 74.9 cm at 15^(0)C . Find the true height of the column at 0^(0)C . alpha_(b) = 20 xx 10^(-6 //0)C and gamma_(Hg) = 175 xx 10^(-6 //^(0)C)

Brass scale of a Barometer gives correct reading at 0^(@)C . Coefficient of linear expansion of brass is 18 xx 10^(-6 xx @)C . If the barometer reads 76cm at 20^(@)C , the correct reading is (gamma_(Hg) = 18 xx 10^(-5 //@)C)

The brass scale of a barometer has no error at 0^(@)C. alpha of brass =0.00002^(@)C^(-1). The reading of the barometer at 27^(@)C is 75 cm. What is the actual reading of the barometer?

A brass rod and a copper rod have same difference in length at all temperatures. If the difference in their length is 10 cm at 0^(@)C find the length of brass and copper roeds. (alpha_("brass")=19xx10^(-6)" "^(@)Candalpha_("copper")=17xx10^(-6)" "^(@)C)

A steel scale is correct at 0^(@)C . The length of a brass tube measured by it at 40^(@)C is 4.5 m. The correct length of the tube at 0^(@)C is (Coefficients of linear expansion of steel and brass are 11xx10^(-6)//""^(@)Cand19xx10^(-6)//""^(@)C respectively.)