388. assignment (sound, thermal expansion, heat)
1. A 70 cm pipe with an open end has been designed to produce sound in the third overtone. Find frequency of this sound?
2. A 300 m long bridge is made of 6 steel sections. How wide must be the gap between the sections, if the maximum and the minimum temperatures the bridge can have are -20 C and +30 C respectively
3. How much energy is required to melt a 0.5kg piece of ice taken at a temp of -20 C?
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