Please fast. Explain properly. I have exams today Q25)a) The triple points of neon & carbon di-oxide are 24.57K and 216.55K respectively. Express these
temperatures on Celsius scale & Fahrenheit scale.
b) What is meant by thermal stress?
c) A steel beam is 5m long at a temperature Of 200C. On a hot day, the temperature rises to 400C .
i) What is the change in the length of the beam due to thermal expansion?
ii) Suppose that the ends of the beam are initially in contact with rigid vertical support. HOW much
force Will be exerted on the Supports if it has a cross-sectional area Of 60 ? Given the coefficient
Of linear expansion of steel= 1.2 x and Young's mcxhllus Of steel 2.0 x N/m2.
26)a) A restoring force is a must for a body to execute S.H.M. Explain, Why.
b) Why do we hear the sound of a distant coming train easily by placing our ears near the rail?
e) extension in string (Obeying Hooke's Law) is x. The speed Of sound in the stretched string is v.
What Will be the speed Of sound in the string if the extension is increased by I
OR
