A 1.2 m copper rod has a mass of 2.15 kg. The when heated has a length of 1.201m. How much heat was needed (in kJ)? (coefficient of thermal expansion = 17 x 10 6; Specific heat capacity =386 J/kg C)
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- What is the cost of heating water in a swimming pool of radius 3.5 m and depth 1.3 m from 13 degress celcius to 27 degress Celcius. If the price of energy is $0.08/ KWh. The specific heat of water is 4186 J/Kg/Cdegrees and density of water is 1000 Kg/m^3. (Hint: Volume of cylinder is πr2h) A. $30.25 B. $65.15 C. $95.50 D. $25.25 E. $133An ordinary drinking glass is filled to the brim with 350 mL of water at 100.0 "C. If the temperature is decreased to 20.0 °C, then what volume of water could be added to the glass? The coefficient of volume expansion for glass is 27.0x108 (C)¹. The coefficient of volume expansion for water is 210 x 10-6 (C)1. 'n Gewone drinkglas is tot heelbo gevul met 350 mL water by 100.0 "C. Watter volume water kan by die glas gevoeg word indien die temperatuur tot 20.0 °C daal? Die volume uitsettingskoeffisiënt van glas is 27.0x 10- (C)¹. Die volume uitsettingskoeffisiënt van water is 210 x 108 (C)¹. Select one: O a. 5.12 mL 5.88 mL. Ob. O c. 9.23 mL O d. 0.756 mL Oe. 7.68 mLWhen a material changes phase - liquid, solid, gas- heat exchange is required. This heat is called the Latent heat. is the equation where L is the Latent heat and is material specific. How much heat is required to take water (mass of .55 kg) from -20 to 20 C? L for ice to water is 33.5 * 104 J/kg. the specific heat of ice is 2090 J/(kg*C).and for water is 4186 J/(kg*C).
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