14) If you wanted to know how much the temperature of a particular piece of material would rise when a known amount of heat was added to it, which of the following quantities would be most helpful to know? A) density B) thermal conductivity C) specific heat D) initial temperature E) coefficient of linear expansion

14) If you wanted to know how much the temperature of a particular piece of material would rise when a known amount of heat was added to it, which of the following quantities would be most helpful to know? A) density B) thermal conductivity C) specific heat D) initial temperature E) coefficient of linear expansion

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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QUESTION 8 A surveyor uses a steel measuring tape that is exactly 75000m long at a temperature of 20 degree celcius? What is the length (in m) of the tape when them temperature is 35 degrees celcius? (a steel = 1.2 x 10 / K) The answer (in fundamental Sl unit) is (type the numeric value only)
8. You drop 182 g of ice at 0°C into a glass containing 431 ml of water at a temperature of 28°C. How many grams of ice will be remaining once the temperature has attained a steady-state (i.e. once it has stopped changing)? Ignore the effects of the glass. Quantity Specific Heat Capacity of Liquid Water 4190 J/kg/°C Specific Heat Capacity of Ice Value 2100 J/kg/°C 334 x 10 J/kg 1 g/ml Latent Heat of Fusion of Water Density of Liquid Water About 31 g About 151 g About 34 g About 65 g About 249 g
4) A ground source heat pump heats a building by extracting heat from the ground and pumping it into the building. Define: Qc = heat extracted from the ground, Qn= heat pumped into the building, W = electric energy used by the heat pump, Tc= temperature of the ground, T = temperature of building (Qc, Qn, and W are positive by definition). Assume Tr > Tc. a) Draw a diagram showing energy flow in and out of the heat pump. b) Write a general expression for the change AS in the entropy of the "universe", that is the heat pump plus the cold and hot reservoirs, in terms of the quantities defined above. Now assume ideal (reversible) operation, and take Te= 10 °C and Tp= 20 °C. What is the coefficient of performance (ČOP) of the heat pump? By what factor would this change if we had Tc = 0 °C instead?
10. In an experiment to determine the specific heat capacity of a certain metal, a student obtained the values given below; Mass of water Mw = 44.3g Mass of calorimeter, Mc = 58.7g Initial temperature of water before boiling, T₂= 18.4 °C Final temperature reached by the heated water, T₁= 85.4 °C Final temperature reached by the mixture (water+ calorimeter+ specimen metal), TF = 20.2 °C Calculate the specific heat capacity, C₁ of the specimen metal using the equation; C₁= {[(MwCw+McCc) (TF-T2)] / M1(T1-TF)} Where; specific heat capacity of water, Cw=4186J/Kg K - specific heat capacity of the calorimeter, Cc= 386J/Kg K Mass of the specimen, M₁ = 17.4g
Q2: A hot concrete slab comes from a furnace at an inatial temperature of 85
3. If the temperature of an ideal gas is raised from 30 °C to 210 °C, how many times faster is the new average (ms) speed of the gas molecules? times
9) The nutritional information on a cereal box shows that one serving of a dry cereal has 200 kilocalories. If one were to burn one serving of the cereal, the amount of heat given off would be sufficient to raise the temperature of 20 kg of water how many degrees Celsius? A) 0.2°C B) 1.0°C C) 2.0°C D) 10.0°C E) 20.0°C Answer: D Topic: Concept 3.2 Skill: Application/Analysis
10.
9. Compute the amount of heat transferred in two hours through a solid brick wall 7m x 3m x 230 mm, when the outer surface is at 5°C and the inner surface is 20°C. The coefficient of thermal conductivity of the brick is approximately 0.6 W/m-K.
2. Compare the heat loss from an insulated and an uninsulated copper pipe (k-400 W/m K) under the following conditions. The pipe has an internal diameter of 10 cm and an external diameter of 12 cm. The inside surface temperature of the pipe is at 110°C. The pipe is located in a space where all possible outside surface temperature of material was maintained at 30°C. The insulation available to reduce heat losses is 5 cm thick and its conductivity is 0.20 W/m K. If the furnace for heating the fluid in the pipe operating at an efficiency of 85% using natural gas priced at Cg = Php 1.00/MJ, what is the daily cost of heat loss per meter of pipe?