A brass wire 1.8 m long at `27^@C` is held when taut with little tension between two rigid supports. If the wire is cooled to a temperature - `39^@C`, what is the tension developed in the wire, if tis diameter is 2.0 mm? Coefficient of linar expansion of brass ` = 2.0 xx 10^5 ^@C^-1`, Young's modulus of brass ` = 0.91 xx 10^11 Pa`.

A hole is drilled in a copper sheet. The diameter of the hole is 4.24 cm at 27^@C . What is the change in the diameter of the hole when the sheet is heated to 227^@C ? Coefficient of linear expansion of copper = 1.70 xx 10^5 ^@C^-1 .

A brass rod of length 50 cm and diameter 3.00 mm is joined to a steel rod of the same length and diameter. What is the change in length of the combined rod at 250^@C , if the original lengths are at 40.0^@C ? Is there a 'thermal stress' developed at the junction? The ends of the rod are free to expand coefficent of linear expansion of brass = 2.0 xx 10^-5 ^@C^-1 , steel = 1.2 xx 10^-5 ^@C^-1 ).

A steel tape 1 metre long is correctly calibrated for temperature of 27.0^@C . The length of a steel rod measured by this tape is found to be 63.0 cm on a h ot day when the temperature is 45^@C . What is the actual 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 = 1.20 xx 10^-5 C^-1 .

At room temperature (27.0 ^@C) the resistance of a heating element is 100Omega . What is the temperature of the element if the resistance is found to be 117Omega . given that the temperature coefficient of the material of the resistor is 1.70 xx 10^-4 ^@C^-1 .

At room temperature (27.0^@ C) the resistance of a heating element is 100 Omega . What is the temperature of the element if the resistance is found to be 117 Omega , given that the temperature coefficient of the materials of the resistors is 1.70 xx 10^-4 ^@C^-1 ?

A wire stretched between two rigid supports vibrates in itsfundamental mode with a frequency of 45 Hz. The mass of the wire is 3.5 xx 10^-2 kg and itslinear mass density is 4.0 xx 10^-2 kg m^-1 . What is the tension in the string?

A wire stretched between two rigid supports vibrates in itsfundamental mode with a frequency of 45 Hz. The mass of the wire is 3.5 xx 10^-2 kg and itslinear mass density is 4.0 xx 10^-2 kg m^-1 . What is the speed of a transverse wave on the string

Calcualte the temperature at which the resistance of a conductor becomes 20% more than its resistance at 27^@C . The value of the temperature coefficient of resistance of the conductor is 2.0 xx 10^-4 K^-1

A steel wirre 0.72 m long has a mass of 5.0xx 10^(-3) kg. If the wire is under a tension of 60 N, What is the speed of transverse waves on the wire?