24) It is necessary to determine the specific heat of an unknown object. The mass of the object is201.0 g. It is determined experimentally that it takes 15.0 J to raise the temperature 10.0° C.What is the specific heat of the object?A) 3,020,000 J/kg.KC) 1500 J/kg.KB) 0.00130 J/kg KD) 7.46 J/kg.K

We have an object of mass m=201 g=0.201 kg and it is given that heat required to raise the…

24) It is necessary to determine the specific heat of an unknown object. The mass of the object is that it takes 15.0 J to raise the temperature 10.0° C. 201.0 g. It is determined experimentally What is the specific heat of the object? A) 3,020,000 J/kg-K C) 1500 J/kg K B) 0.00130 J/kg-K D) 7.46 J/kg.K

24) It is necessary to determine the specific heat of an unknown object. The mass of the object is that it takes 15.0 J to raise the temperature 10.0° C. 201.0 g. It is determined experimentally What is the specific heat of the object? A) 3,020,000 J/kg-K C) 1500 J/kg K B) 0.00130 J/kg-K D) 7.46 J/kg.K

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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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?
23) A carpenter is driving a 15.0-g steel nail into a board. His 1.00-kg hammer is moving at 8.50 m/s when it strikes the nail. Half of the kinetic energy of the hammer is transformed into heat in the nail and does not flow out of the nail. What is the increase in temperature of the nail after the three blows that the carpenter needs to drive the nail in completely? The specific heat of steel is 448 J/kg. K. A) 2.7 K B) 7.7 K C) 3.6 K D) 1.8 K E) 8.1 K
7) What is the total amount of heat in units of Btu’s we must add to a 5.00 pound block of ice at negative 12 degrees Fahrenheit to turn all of it into steam at 242.00 degrees Fahrenheit? (the heat of fusion and the heat of vaporization in US units is NOT in Table 15. You will find those values in the chapter material in the book) Use a temperature bar to show your work. Heat of vaporization (Water) = 540 cal/g, or 540 kcal/kg, or 2.26 MJ/kg, or 970 Btu/lb
10.) Specific heat capacity is related to the amount of internal energy a. Needed to change the temperature of one gram of a substance by one degrees C. b. Transferred by one molecule. c. Transferred by one object d. A specific object has.
16) The figure shows a graph of the temperature of a pure substance as a function of time as heat is added to it at a constant rate in a closed container. If Lp is the latent heat of fusion of this substance and Ly is its latent heat of vaporization, what is the value of the ratio Ly/LF? Temp. Time B) 4.5 C) 3.5 D) 1.5 E) 5.0 A) 7.2
7) Express a body temperature 98.6°F in Celsius degrees. A) 72.6°C B) 37.0°C C) 45.5°C D) 66.6°C
Energy in Thermal Processes Multiple choices 1-5
102. You can double both the pressure and the volume of an ideal gas if you change the temperature of the gas by A) reducing it to one-quarter of its original value. B) doubling it. C) reducing it to one-half of its original value. D) quadrupling it. E) doing none of these.
DATA: LATENT HEAT OF FUSION MASS of EMPTY CALORIMTER (g) 48.1g MASS of CALORIMETER with WATER (g) 181.5g MASS of CALORIMETER with WATER AND ICE (g) 211.9g INTIAL TEMPERATURE of Water (To): 820C INTIAL TEMPERATURE of ICE(To): OoC FINAL TEMPERATURE(TF): 51oC
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
18) If, with steady state heat flow established, you double the thickness of a wall built from solid uniform material, the rate of heat loss for a given temperature difference across the thickness will A) also double. B) become one-fourth its original value. C) become one-half its original value. D) become four times its original value. E) become 1/√√2 of its original value.
9. A glass rod is 0.50 m long and has a mass of 0.50 kg. When the rod is heated, its length is increased by 2.0 x 104 m. Calculate the amount of energy that is added to the rod as heat. Note: Cglass=840 J/(kg °C) and glass = 9.0 x 10-6 °C -¹.