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1 point 5 A12.3 gsolid gold sphere at 27.2 C drops 117 m to the ground. 58.1% of the change in gravitational potential energy of
1 point 5 A12.3 gsolid gold sphere at 27.2 C drops 117 m to the ground. 58.1% of the change in gravitational potential energy of the sphere-ground system goes into increasing the internal energy of the sphere. Find the sphere's final temperature (in degrees celsius) Type your answer... 1 point 5 A0.153 kg glass cup contains 0.726 kg of water in thermal equilibrium with the cup at 69.3 C'. The combination cup and water is cooled uniformly so that the temperature decreases by 1.32C per minute. At what rate (in Watts) is energy being removed? Type your answer... 1 point P What mass (in kilograms) of ethyl alcohol at 39.3 C must be allowed to come to thermal equilibrium with a 2.56 kg cube of solid gold initially at 302 C to lower the temperature of the gold to 54.2 C? Assume there are no permanent changes of state. Type your answetr... n 1 point PN You have to calculate the heat required to melt an ice cube. What equation should you use? Q = ::mLf Q = ::va Q = mcAT Q = meDLT 9 1 point Heat is being conducted through a material at a rate of P =145 Watts. How much heat (in Joules) is transferred int =1.95 s? Type your answer... 10 1 point A quantity of m =2.49 kg of some unknown substance heated from T; =30.2 C to Tf =96.4 C. The heat required is Q =300,000 J. What is the substance? O Beryllium Cadmium Aluminum O Copper 11 1 point Some water is cooled from Ti =60.6 C to Tf =39.4. C, during which process, Q =-245933 J were removed from the water. What is the mass of the water? Note that the specific heat of water is 4186 J / kg . C, the latent heat of fusion of water is 3.33 x 105 J/ kg, and the latent heat of vaporization of water is 2.26 x 10 J/kg. Type your answer... 12 1 point Steam of mass m =1.56 kg is heated from Ti =409 C to Tf =468 C. How much heat (in Joules) is required? Note that the specific heat of steam is 2010 J /kg . C, the latent heat of fusion of water is 3.33 x 109 J/ kg, and the latent heat of vaporization of water is 2.26 x 10 J/kg. Type your answer... Submit1 point g A stove has a burner with a thermal power rating of 1.20 x 10* Btu/hour. You place a 0.353 kg aluminum pot containing 3.17 liters of water at 23.7 C on the burner. Assume atmospheric pressure of 1 atm. Convert 1.20 x 10* Btu/hour to Joules/s. Type your answer... 1 point g A stove has a burner with a thermal power rating of 1.20 x 10* Btu/hour. You place a 0.363 kg aluminum pot containing 2.65 liters of water at 22.5 C' on the burner. Assume atmospheric pressure of 1 atm. Calculate t,;; (in seconds), the time required to bring the water to a boil. Type your answer... 1 point g Astove has a burner with a thermal power rating of 1.20 x 10* Btu/hour. You place a 0.363 kg aluminum pot containing 2.69 liters of water at 20.3 C on the burner. Assume atmospheric pressure of 1 atm. Calculate Qpoi; (in Joules), the amount of thermal energy required to bring the water to a boil. Type your answer... n 1 point P A stove has a burner with a thermal power rating of 1.20 x 10* Btu/hour.You place a 0.365 kg aluminum pot containing 3.64 liters of water at 21.8 C on the burner. Assume atmospheric pressure of 1 atm. Calculate tyqporate (in seconds), the time required for all the water to evaporate once the boiling has begun
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