A househusband is cooking beef stew for his family in a pan that is (a) uncovered, (b) covered with a light lid, and (c) covered with a heavy lid. For which case will the cooking time be the shortest? Why?

Q: The temperature of a rigid, sealed, i.e., constant-volume, container of gas increases from 100°C to…

A: temperature T1=100oC = 100+273 =373KT2=200oC =200+273 =473K

Q: An ice bag containing 0°C ice is much more effective in absorbing heat than one containing the same…

A:

Q: A cold Pepsi is taken out of a 50◦ refrigerator and placed on a picnic table. The outside…

A: GivenPepsi taken out at temperature (T)=50°COutside temperature (T0)=90° Cafter 10 min   pepsi…

Q: A copper teakettle with a circular bottom 30.0 cm in diameter has a uniform thickness of 2.5 mm. It…

A: diameter of bottom= 30 cm thickness=2.5 mm Temperature of burner= 150 C

Q: A stone floor feels very cold to bare feet in the winter but a carpet in the same room feels…

A: A stone floor feels very cold to bare feet in the winter but a carpet in the same room feels…

Q: You are boiling pasta and absentmindedly grab a copper stirring spoon rather than your wooden spoon.…

A: rectangular cross section of copper spoon = 25 mm ×1.8 mm Heat energy transferred = 40 J Temperature…

Q: A container holds 2.0 g of Helium at a pressure of 6.0 atm. (a) How much heat is required to…

A: Let n denotes the number of moles of the Helium gas. Let m is the mass of the Helium in a container…

Q: Consider a person outdoors on a cold night. Construct a problem in which you calculate the rate of…

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Q: Dealing with three different samples (iron, glass, and water) in a thermodynamic experiment at 10°C.…

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Q: Two boxes, A and B, contain the same ideal gas. Gas A has a higher temperature, while gas B has a…

A: Thermal energy can be given by, Et=mCT where m= molar mass, C= specific heat, and T= temperature.

Q: If two objects are in thermal equilibrium, they will have (a) Same temperature (b) same energy (c)…

A: Two objects in thermal equilibrium.

Q: Liquid water turns out to have a higher density at 4C degrees than at any other temperature. What…

A: Thermal expansion coefficient describe the relation between the size of an object and change in the…

Q: A poker is a stiff, nonflammable rod used to push burning logs around in a fireplace. Suppose it is…

A:

Q: ne aluminum and the c than the copper

A: Option 5

Q: A car weighing 1.30×10^3 kg reduces its speed with strong braking from 130 km/h to 90.0 km/h. By how…

A: SOlution: Given that M = 1.3 x103  kg V1 = 130 km/h v2 = 90 km/h m = 6 kg C = 450 J/kgK

Q: It is commonly recommended that hot foods be cooled first to room temperature by simply waiting a…

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Q: Equal masses of substance A at 10.0°C and substance B at 90.0°C are placed in a well-insulated…

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Q: 1) A glass windowpane in a home is 0.62 cm thick and has dimensions of 1.5 m \times 2.3 m. On a…

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Q: After driving a car for a long time, you can feel how warm the engine is when you place your hand on…

A: After driving a car for a long time, the hood becomes warm due to the conduction of heat from the…

Q: A corner reflector, much used in optical, microwave, and other applications, consists of three plane…

A:

Q: A pot on the stove contains 300 g of water at 20°C. An unknown mass of ice that is originally at…

A: This question is based on Calorimetry Concept. When heat is supplied to water, the temperature…

Q: When you take a bath, how many kilograms of cold water (10°C) must you mix with hot water (50°C) so…

A: Write the given values with the suitable variables. T1=10 °CT2=50 °CT=35 °CM=180 kg Here, T1, T2, T,…

Q: Which one is true? The Newton's law of cooling is frequently qualified to include the condition that…

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Q: The heat of combustion of gasoline is approximately 47 kJ /g . If a gasoline engine operated between…

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Q: Question 4. A glass windowpane in a home is 0.42 cm thick and of 1.0 m x 2.0 m. On a certain day,…

A: Given: thickness L =0.42 cm =0.42*10-2 mdimensions = 1.0m X 2.0 m; area A = 2 m2indoor temperature…

Q: A pot of water is boiling on a gas stove, and then you turn up the heat. What happens? (a) The…

A: A pot of water is boiling on a gas stove. When heat is turned up boiling water is converted to…

Q: A rock of mass 0.432 kg falls from rest from a height of 17.4 m into a pail containing 0.373 kg of…

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Q: Liquid water turns out to have a higher density at 4 Degrees Celcius than at any other temperature.…

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Q: To measure the heat capacity of an object, all you usually have to do is put it in thermal contact…

A: Given: The initial temperature of the water is 20° C. The mass of the water in the cup is 250 g. The…

Q: A rock of mass 0.213 kg falls from rest from a height of 27.4 m into a pail containing 0.420 kg of…

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Q: An engineer is investigating energy loss through windows. The windowpane of interest is 0.450 cm…

A: Given, the thickness of the windowpane t = 0.450 cm Area of the windowpane,  0.82×1.95 m2 thermal…

Q: On a hot summer day, a student turns his fan on when he leaves his room in the morning. When he…

A: The fan makes us feel cooler due to the process of evaporation taking place on the skin of our…

Q: Consider a 3-m-high, 6-m-wide, and 0.3-m-thick brick wall whose thermal conductivity is k = 0.8 W/m…

A: Given: The height of the wall is h = 3 m The wide of the wall is w = 6 m The thermal conductivity of…

First law of Thermodynamics

The word thermodynamics consists of two words: thermo- and dynamics. Dynamics means the study of motion. The field of thermodynamics is all about the study of the movement of heat. In a more meaningful way, it is stated as the study of the transfer of energy. Energy transfer is something that we encounter in day-to-day life. Automobiles, chemical reactions, refrigerators, and power generators work on the basis of thermodynamic principles.