PCS 227 Chapter Notes - Chapter 12: Thermal Expansion, International System Of Units, Heat Capacity
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Chapter 12 | temperature and heat | notes. Temperature in kelvin (k): (cid:1846)=(cid:1846)+(cid:884)(cid:889)(cid:885). (cid:883)(cid:887) (cid:1846)(cid:2868) (cid:2868) (cid:1846)(cid:2868)+ (cid:1846) (cid:2868)+ . Thermal expansion (linear thermal expansion of a solid): (cid:2868)=(cid:2009) (cid:1846) (cid:1849) (cid:1857)(cid:1870)(cid:1857) (cid:2009) (cid:1871) (cid:1872) (cid:1857) (cid:1867)(cid:1857)(cid:1858)(cid:1858)(cid:1866)(cid:1857)(cid:1866)(cid:1872) (cid:1867)(cid:1858) (cid:1866)(cid:1857)(cid:1870) (cid:1868)(cid:1866)(cid:1871)(cid:1867)(cid:1866) The beam is mounted between two concrete supports when the temperature is 23 . What keep the beam from expanding when the temperature rises to 42 . Steel"s coefficient of thermal expansion: 12. 0 x 10-6 (cid:2869) . compressional stress must the concrete supports apply to each end of the beam, if they are to. (cid:883)(cid:884). (cid:882) (cid:883)(cid:882) 6(cid:883) (cid:4666)(cid:886)(cid:884) (cid:884)(cid:885) (cid:4667) (cid:1845)(cid:1872)(cid:1870)(cid:1857)(cid:1871)(cid:1871)= (cid:2868)=(cid:884). (cid:882) (cid:883)(cid:882)(cid:2869)(cid:2869) (cid:1865)(cid:2870) (cid:1845)(cid:1872)(cid:1870)(cid:1857)(cid:1871)(cid:1871)=(cid:889). (cid:888) (cid:883)(cid:882)6 [ (cid:1865)(cid:2870)] Heat is the energy that flows from a higher temperature object to a lower temperature object because of a difference in temperatures. The heat flows from hot to a cold originates in the internal energy of the hot substance.
