(a) How much heat transfer is required to raise the temperature of a 0.750-kg aluminum pot containing 2.50 kg of water from 30.0ºC to the boiling point and then boil away 0.750 kg of water?(b) How long does this take if the rate of heat transfer is 500 W1 watt = 1 joule/second (1 W = 1 J/s) ?

Q: A naked patient undergoes surgery in a warm room. Determine the ratio Pe/Pe. where Pe is the…

A: The skin temperature Ts=320C The room temperature TR=290C The total body area A=1.3 m2 The…

Q: A wall 2 cm thick is to be constructed from material that has an average thermal conductivity of 1.3…

A:

Q: A 500.0-g chunk of an unknown metal, which has been in boiling water for several minutes, is quickly…

A: As per the energy conservation, the heat lost by the metal of mass 0.5 kg is equal to the heat…

Q: A 1.50 kg  iron horseshoe initially at 6000 C is dropped into a bucket containing 20 kg of water  at…

A: Mass of Iron,(MI)=1.50 kg ----------(1) [Given] The initial temperature of iron,(T1)=6000 C…

Q: During heavy exercise, the body pumps 2.00 L of blood per minute to the surface, where it is cooled…

A: The expression for the required rate of heat transfer is,

Q: A steel bar 7 cm long is welded end to end to a copper bar 2 cm long. Each bar has a square cross…

A:

Q: A 25-g glass tumbler contains 200 mL of water at 24°C.   1)If two 15-g ice cubes, each at a…

A:

Q: - The increase in internal energy of 1kg of water at 100°C when it is converted into steam at the…

A:

Q: Anyperthermic male weighing 104kg, has a mean body temperature of 42°C. He is to be Cooled to 37°C…

A:

Q: The maximum amount of water an adult in temperate climates can perspire in one hour is typically 1.8…

A:

Q: Hot air at 80°C is blown over a 2-m * 4-m flat surface at 30°C. If the average convection heat…

A: The heat transfer rate is given by,

Q: During heavy exercise, the body pumps 2.00 L of blood per minute to the surface, where it is cooled…

A: Heat transfer is given by,  Q=mS∆T Here,  m is mass and S is specific heat of blood and ∆T is change…

Q: One end of an insulated metal rod is maintained at 100 ∘C, while the other end is maintained at 0∘C…

A:

Q: Long aluminum wires of diameter 5 mm (r = 2702 kg/m3 and cp = 0.896 kJ/kg·°C) are extruded at a…

A: Diameter of aluminum wire,

Q: Steam at 320°C flows in a stainless steel pipe (k =15 W/m·K) whose inner and outer diameters are 5…

A: Diagram of the system:

Q: How long does it take a 750-WW coffeepot to bring to a boil 0.85 LL of water initially at 18 ∘C∘C?…

A:

Q: A total of 0.8 Kg of water at 20 oC is placed in a 1.2 KW electric kettle. How long a time in unit…

A:

Q: Calculate the rate of heat loss in breathing from heating up the air and moisturizing the air in…

A: In this question we have to calculate the rate of heat loss in breathing from heating up the air and…

Q: A 25-g glass tumbler contains 200 mL of water at 24°C. 1) If two 15-g ice cubes, each at a…

A: Given, mass of the tumbler container, m= 25 g mass of the water, mw = 200 ml temperature of the…

Q: A block of ice is kept pressed against one end of a circular copper bar of diameter 2 cm, length 20…

A:

Q: During the winter, the inside of an average house is maintained at 20 °C, while the outside…

A: Therefore  the heat flux from the room to the surroundings is 100 W/m2

Q: The convection heat transfer coefficient for a clothedperson standing in moving air is expressed as…

A:

Q: A soldering iron has a cylindrical tip of 2.5 mm in diameter and 20 mm in length. With age and…

A: It is given that,

Q: alue of specific heat for copper is 390  J/kg⋅C∘ , for aluminum is 900 J/kg⋅C∘, and for water is…

A: Given  Specific heat of copper Ccu  = 390 J/kg °C Specific heat of aluminium CAl = 900 J/kg° C…

Q: A naked patient undergoes surgery in a warm room. Determine the ratio Pc /Pe, where Pc is the…

A:

Q: The heating element in an electric kettle is rated as 2.ok. If the water in the kettle is at…

A:

Q: Saturated steam at 1 atm condenses on a vertical plate that is maintained at 90°C by circulating…

A: Using table A-5, the enthalpy of vaporization of water at 1 atm,

Q: If the specific heat capacity of silver is 0.24 J/degree Cg, calculate the energy required to raise…

A:

Q: On a hot day, the temperature of an 82000-L swimming pool increases by 1.45°C. What is the net neat…

A: Volume (V)=82000L Temperature=1.45°C

Q: On a hot dry day, evaporation from a lake has just enough heat transfer to balance the 1.00 kW/m2 of…

A: Given: The heat transfer from the sun is Q=1 kW/m2. The time of evaporation is t=1 h. The area of…

Q: If you add 700 kJ of heat to 700.0g of water originally at 70.0°C, how much water is left in the…

A:

Q: An ice cube of mass 500 g and at 0 degrees * C is dropped into a cup containing 1kg of water at 70…

A: Let's define few things first: Latent heat of fusion is the amount of energy that must be supplied…

Q: For the human body, what is the rate of heat transfer by conduction through the body’s tissue with…

A: Rate of transfer of heat through body’s tissue is,

Q: A 390-g metal container, insulated on the outside, holds 170.0 g of water in thermal equilibrium at…

A: The heat energy gained by ice can be broken into three steps (a) The heat gained by ice at -15…

Q: A Styrofoam container used as a picnic cooler contains a block of ice at 0 oC. If 0.5 kg of ice…

A: It is given that,  m=0.5 kgt=0.79 hr=2844 sec

Q: What will be the rise in temperature in 30 minutes of a block of copper of 500-gram mass if it is…

A:

Q: In a espresso coffee shop stand they prepare steamed milk by bubbling steam at 140 degrees Celsius…

A: Temperature of steam = 140oC Initial temperature of milk = 30oC Final temperature of milk and…

Q: How many joules of heat transfer are required to thaw a 0.777-kg package of frozen vegetable juice…

A: The latent heat of fusion is, L=334 kJ/kg=334×103 J/kg The mass of the package is, m=0.777 kg

Q: Suppose same amounts of heat transfer (Q) into different masses of copper and water, causing same…

A: Heat transfer to copper and water are the same

Human Metabolism

Being described as the most complicated machine ever encountered by humans, the human body and the cell metabolism is nothing less than a wonder. Metabolism is the set of life-sustaining chemical reactions within organisms.