8 In An object having emissivity 0.0867 radiates heat at 20 W, and temperature is T. IT is doubled, what is the rate at which it radiates heat? a) 16 W b) 64 W c) 240 W d) 320 W
Q: A rectangular window that is 1.20m wide and 1.8m high has a thickness of 6.2 mm and thermal…
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Q: 13. A 10.0 g metal sample at 25 Celsius was heated at a certain temperature which causes it to…
A: mass of metal= 10 g temp (initial) = 25 C Q=800 J
Q: 11. A gas is compressed from 600cc to 200cc at a constant pressure of 400kPa. At the same time, 100J…
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Q: 1. At what net rate does heat radiate from a 375- m² black roof on a night when the roof's…
A: Area of roof A= 375 m2 Roof's temperature T0 = 30° C= 303 K Surrounding temperature Ts= 15°C= 288K…
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Q: 1.An electric kettle transfers 900 000 J of energy to some water in 10 minutes. (a) Estimate the…
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Q: A 30.4-kg block of ice at 0 °C is sliding on a horizontal surface. The initial speed of the ice is…
A: Since we answer up to first question, we will answer the first question only. Please resubmit the…
Q: 25. The specific heat of Al is 900 J/kg.C and its latent heat of fusion L, 4.0 x 105 J/kg at 660 C.…
A: Given Specific heat = c = 900 J/kg.°C Latent heat of fusion = Lf = 4.0 × 105 J/kg at 660 °C Mass = m…
Q: Suppose you stand with one foot on ceramic flooring and one foot on a wool carpet, making contact…
A: A) Write the expression for the rate of heat transfer through the ceramic. Qt=kA(T2−T1)dQt=(0.84…
Q: Q: Consider the section of wall as shown in the figure, assuming one dimensional heat flow,…
A: equvalent thermal current circuit is shown in below figure. net thermal resistance of the circuit if…
Q: A black wood stove has a surface area of 1.10 m and a surface temperature of 141 C. What is the net…
A: Black body radiation.
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Q: Part A On a cold winter day when the temperature is -19 0°C, what is the amount of heat needed to…
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Q: You add 135 kJ of heat to a block of metal with a mass of 5.0kg. The temperature of the metal rises…
A: The problem can be solved by using the formula for specific heat.
Q: 3. The same energy Q enters five different substances as heat. The temperature of 3 g of substance A…
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Q: Problem 1- Heat Transfer How thick would the glass panes on a double-glazed window (air gap = 2mm)…
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Q: 1.) A typical person has an average heart rate of 69.0 beats/min. Calculate the given questions. How…
A: 1.) heart rate =69beats/min1year =365×24×60 =525600minheart beat in 1 year…
Q: A surveyor uses a steel measuring tape that is exactly 50 m long at a temperature of 20°C. what is…
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Q: A person sits in a room with surrounding air at 26°C and convection coefficient over the body…
A: Given data. Here, h is convection coefficient. A is the surface area of the body. When the person…
Q: If the temperature of the surface of the object is 649.1 K, then calculate its value in °F. O a.…
A: Given Temperature in kelvin T(K)=649.1K
Q: 1. Radiation makes it impossible to stand close to a hot lava flow. Calculate the rate of heat…
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Q: 3.) A tall unclothed athlete with a skin temperature of 34°C stands in a dark room with a…
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Q: 5) A student is heating a block of chocolate in a pan on the stove. He uses a cooking thermometer to…
A: A graph is provided which shows the variation in temperature of chocolate because od heating as time…
Q: 1. How long (in seconds) will it take to heat 40 kg of water from 40°C to 80°C with a 20-kW…
A: Since there are multiple questions posted, we will answer the first question. The heat energy needed…
Q: A glass window is 2.7 mm thick, is 1.59 m tall by 0.8 m wide, and has a thermal conductivity of 1.0…
A: Given that:
Q: Rocky spends all the afternoon hours watching sports on cable TV. In the process, he does 1,179 J of…
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Q: A 2 kW electric heater raises the temperature of 400 g of water from 15 °C to 353.15 K. How long…
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Q: If the temperature of the surface of the object is 705.8 K, then calculate its value in °F. O a.…
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Q: If the temperature of the surface of the object is 505.7 K , then calculate its value in °F. a.…
A: Answer : option d i .e. 450.86 °F
Q: Example: A building has a south-facing thermal storage wall with night insulation of Rins equal to…
A: From the given data, the coefficient Uk can be calculated as follows, Uk=1wk+1hi=10.422+18.3=3.026…
Q: If the temperature of the surface of the object is 701.8 K , then calculate its value in °F. a.…
A: Surface temperature of object = 701.8 kelvin
Q: The temperature of water in a swimming pool decreases by 5.0 K during the night. The mass of the…
A: Given, The temperature of water decreases by 5 k mass of water in the pool is 560,000 kg specific…
Q: 13. A 10.0 g metal sample at 25 Celsius was heated at a certain temperature which causes it to…
A: Given that,Mass of metal : m = 10 (g)Temperature:T = 25°C Heat : Q = 800 (J)Here we need to find the…
Q: Radiation makes it impossible to stand close to a hot lava flow. Calculate the rate of heat transfer…
A: Area of fireplace is Temperature of lava is Temperature of surroundings is Emissivity of lava is…
Q: 12. A block is pushed up a rough ramp, at constant speed, by a force that is parallel to the ramp…
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Q: The block in the drawing has dimensions LO×2L0×3L0.where Lo =0.3 m. The block has a thermal…
A: Give Thermal conductivity = 100j/s-mC Delta T = 21- 12 ° C = 9 ° c
Q: Calculate the rate of heat flow through a composite wall having three layers. The thicknesses of the…
A: GivenTi=328.42 KTo=274.43 KRate of heat flow,H=Ti-ToReqas area of slabs remain same, so slabs are…
Q: 18. A 33 cm long Cu rod's one end is exposed to 500 Celsius and the other end at 20 Celsius.…
A: The rate of heat flow along the copper rod is calculated by using the given equation below. Here, k…
Q: A 90.0-g piece of solid copper at 1000 C is placed in a thermally insulated flask tht contains 40.0…
A: Given,mass of the copper, m = 90.0 gtemperature, Tc = 100 °Cspecific heat, Cc = 0.0920 calg.°Cmass…
Q: A18-kgpiece of aluminum (which has a specific heat of900 J/kg·°C) is warmed so that its…
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Q: 5. Calculate the rate of heat conduction through house walls that are 13.0 cm thick and that have an…
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Q: 13. A 10.0 g metal sample at 25 Celsius was heated at a certain temperature which causes it to…
A: Given Mass of metal m=10g Initial Temperature Ti=250 C Heat absorb Q=800J Specific heat metal…
Q: Q5) Problem 95: Page 62 What is the rate of heat conduction th thick fur of a large animal having a…
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Q: If the temperature of the surface of the object is 513.1 K, then calculate its value in °F. O a.…
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Q: The figure shows the cross section of a wall made of three layers. The thicknesses of the layers are…
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Q: Question 6 There is a window whose dimensions are 1 m by 3 m, and is 10 cm thick. Its separates the…
A: Given: Area of window A=1m×3m=3 m2, Thickness of window d=10 cm=0.10 m, Conductivity of window k=250…
Q: If the temperature of the surface of the object is 745.1 K, then calculate its value in °F.
A: SOlution: Given that T = 745.1 K
Q: Q2/ A container's wall, 0.32 m thick, is fabricated of inner layer of fire brick k-0,84 W/m "C)…
A: Solution: Given Container's wall = 0.32 m= 320 mm thick Thermal conductivity = k1=0.84 W/m2.Co…
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