Class Test-II Phy-105-02 Fall 2019 Section-III: (Problem solving each carrying 2 marks; 2X5 =10) 21. Find...
Class Test-II Phy-105-02 Fall 2019 Section-III: (Problem solving each carrying 2 marks; 2X5 =10) 21. Find the Young's modulus (Y) of the steel rod of 0.01 m long and a cross sectional area of 0.001 cm', elongates 0.1% when supported by a 100 kg load, hung from the other end. 22. Find the speed of water at the narrow end of a pipe through a cross section of 0.001 m when water flows from the other end of area 0.002 m'at a flow speed of 1000 cm/sec? 23. Find the change in length or extension of a 0.1 m long measuring tape at a temperature difference of 27°C. (Coefficient of linear expansion of the tape material'a'is 1.1 x 106 "Cy! 24. Find volume of an ideal gas (10 moles) expanded at a pressure of 1.2 N/m² and temperature of 327 K? (R = 8.31 J/mol K)? 25. How power (P) of an emissive material change if temperature (T) becomes doubled?