[" Example "14.9" A steel ruler exactly "20cm" long is graduchts "],[" to give correct measurements at "20^(@)C" ."],[" (i) Will it give readings that are too long or too short at lower "],[" temperatures? "]

A steel ruler exactly 20 cm long is graduated to give correct measurements at 20^@C . (a) Will it give readings that are too long or too short at lower temperatures? (b) What will be that actual length of the ruler when it is used in the desert at a temperature of 40^@ C ? alpha_(steel = 1.2 xx 10^-5(.^@ C)^-1 .

A steel rular exactly 20 cm long is graduated to give correct measurements at 20^@C . (a) Will it give readings that are too long or too short at lower temperatures? (b) What will be that actual length of the rular when it is used in the desert at a temperature of 40^@ C ? alpha_(steel = 1.2 xx 10^-5(.^@ C)^-1 .

A steel rular exactly 20 cm long is graduated to give correct measurements at 20^@C . (a) Will it give readings that are too long or too short at lower temperatures? (b) What will be that actual length of the rular when it is used in the desert at a temperature of 40^@ C ? alpha_(steel) = 1.2 xx 10^-5(.^@ C)^-1 .

A steel rular exactly 20 cm long is graguated to give correct measurements at 20^@C . (a) Will it give readings that are too long or too short at lower temperatures? (b) What will be that actual length of the rular when it is used in the desert at a temperature of 40^@ C ? alpha_(steel = 1.2 xx 10^-5(.^@ C)^-1 .

A steel scale gives correct reading at t_1^@C . When temperature changes to t_2^@C then

A steel scale gives correct reading at 10^(@)C . If the length of a rod is measured with the help of that scale at 30^(@)C then the measured length will be

A steel tape gives corrent measurement at 20^(@)C. A piece of wood is being measured with the steel tape at 0 C.' The reading is 25 cm on the tape. The real length of the given pices of wood must be

A surveyor uses a steel measuring tape that is exactly 50.000 m long at a temperature of 20^(@)C What is its length on a hot summer day when the temperature is 35^(@)C ? (alpha_("steel")=1.2xx10^(-5)K^(-1))