Physics Final Exam

2 Pages

Physical Science
Course Code
PHSC 1001

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PhysicsFinalExam1Heat energy travels from an object with a high temperature to an object with a lower temperature 2A substance that heats up relatively quickly has a low specific heat 3Heat energy measured in units of calories and joules 4Ice has a lower density that water because ice is made of openstructured hexagonal crystals 5Compared to a giant iceberg a hot cup of coffee has higher temperature but less internal energy 6When a bimetallic bar made of copper and iron strips is heated the bar bends toward the iron strip This reason for this is copper expands more than iron 7Room temperature on Kelvin scale is about 300K 8Some molecules are able to absorb large amounts of energy in the form of internal vibrations and rotations Materials composed of such molecules have high specific heats 9If you measure a plot of land with a brass tape on a cold day the actual amount of land you have will be larger than measured 10Substances absorb heat energy by the process of conduction radiation and convection 11A good heat conductor is a poor insulator 12Warm air rises because fastermoving molecules tend to move to regions of less density and pressure 13The higher the temperature of an object the shorter the wavelengths it radiates 14Newtons law cooling applies to objects that are heating and cooling 15Both black and white road surfaces absorb sunlight At the end of a sunny day the warmer road surface will be the black surface 16Evaporation is a cooling process and condensation is a warming process 17Evaporation is a cooling process because the more energetic molecules are able to escape the liquid 18When liquids change to a solid state they release energy 19To wholly convert a given amount of heat energy into mechanical energy is impossible regardless of technique used 20The first law of thermodynamics is a restatement of the conservation of energy Ch 15 Temperature HeatExpansion Solid liquid gas plasma What is the difference between temperature and heat What is plasma Temperature
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