A glass rod when measured with a zinc scale, both being at 30°C, appears to be of length 100cm. If the scale shows correct reading at 0°C, determine the true length of the glass rod at (a) 30°C and (b) 0°C. ( 'alpha' for glass = 8 xx 10^(-6)//°C and for zinc = 26 xx 10^(-6)//°C )

A glass rod when measured with a zinc scale, both being at 30°C, appe

1.	A glass rod when measured with a zinc scale, both being at 30°C, appears to be of length 100cm. If the scale shows correct reading at 0°C, determine the true length of the glass rod at (a) 30°C and (b) 0°C. ( 'alpha' for glass = 8 xx 10^(-6)//°C and for zinc = 26 xx 10^(-6)//°C )
Answer» `100.078` CM `100.054` cm `100.024` cm `100.032` cm Answer :A