1. Air at 1 atm and 20°C is flowing over the top surface of a 0.5-m long thin plate. The airstream velocity is 50 m/s, and the plate is maintained at a constant surface temperature the average convection heat transfer coefficient. of 180°C. Determine
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…
Q: The A string of a violin produces a sound different in timbre than that of the A string of a guitar…
A: Given, The A string of a violin produces a sound different in timbre than that of the A string of a…
Q: At 20°C, a metal cylinder has a radius of 0.03 m and a height of 1.2 x 10-² m. Calculate the…
A: Given Initial radius r = 0.03 m Height h = 1.2 × 10-2 m Initial volume V1 = π r2 h = 3.14 × (0.03)2…
Q: Calculate the rate of heat conduction out of the human body, assuming that the core internal…
A:
Q: A container made up of Pyrex glass has a volume of 0.0457 m at 25 C. After heated, the final volume…
A: Given: The initial volume of the container is Vi=0.0457 m3. The initial temperature of the…
Q: 4. A box with total wall area of 0.6m² and wall thickness 3cm is used to cool drinks. The inner and…
A: given,Area A=0.6m2d =3cmthermal conductivity of box k=0.01W/mKi)The rate of heat flow,…
Q: 57. Radiation makes it impossible to stand close to a hot lava flow. Calculate the rate of heat…
A: Let the heat transferred be Q in time t seconds, then the rate of heat transfer is given as Qt. Area…
Q: 1. Radiation makes it impossible to stand close to a hot lava flow. Calculate the rate of heat…
A:
Q: 4. A 1.50-kg iron horseshoe initially at 600°C is dropped into a bucket containing 20.0 kg of water…
A: We assume that the water-horseshoe system is thermally isolated (insulated) from the environment for…
Q: 89. A thick, vertical iron pipe has an inner diameter of 0.065 m. A thin aluminum disk, heated to a…
A: Given Data: The inner diameter of an iron pipe is, d1=0.065 m The temperature at which aluminium…
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: 12. A 0.400-kg of ice is initially at temperature of -12.0 °C. How much heat is required to melt…
A: mass of ice = 0.400 kg initial temperature of ice = -12oC final temperature = 0o C
Q: Consider a person whose exposed surface area is 1.7 m2, emissivity is 0.85, and surface temperature…
A: Given: Surface area, A = 1.7 m2 Emissivity ε = 0.85 Surface temperature, Ts = 30℃ To determine the…
Q: 5. Soon after the Earth formed, heat released by the decay of radioactive elements raised the…
A: Given: Temperature, T1 = 300 K T2 = 3000 KAverage coefficient of volume…
Q: A copper sphere of surface area 300 sq cm and at a temperature of 427"C is plcec enclosure…
A: To find-Rate at which heat is being lost by this sphere dQdt=?Given-e=0.6σ=5.7×10-8S.I. UnitsA=300…
Q: 1. An iron plate 2cm thick has a cross-sectional area of 5000cm?. One face is at 150°C, and the…
A: Given Thickness of plate (L ) = 2 cm = 0.02 m Area of…
Q: 20. "Magic Juice" is 50 % liquid carrot juice and 50% water. A vendor buys agic juice at P 100…
A:
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: 2. During the peak of the summer period in Sohar, an oil truck loaded 80,000 liters gas. On the way…
A: Given,initial volume V1=80,000 litersinitial temperature =Tfinal temperature T-24K
Q: 5. Calculate the rate of heat conduction through house walls that are 13.0 cm thick and that have an…
A:
Q: 3. Consider that immediately after sunset the surface of the Earth is at a temperature of 20° C and…
A:
Q: Number 3 A food product with 73% moisture content in a 5 cm diameter can wants to be frozen. The…
A: Given data- Density of the product=970 kg/m3 Thermal conductivity of the product=1.2 W/m.K Freezing…
Q: Since the night sky acts like a blackbody radiator at a temperature 7,--23°C calculate the time…
A: Given:surrounding temperature, Ts = -23oC = 250 Kmas of water, m = 4.5×10-3 kgeffective surface…
Q: 25- a. The walls of a house are 15 cm thick and have an average thermal conductivity four times that…
A: Rate of heat transfer through conduction is given by: Q/t = P = k*A*dT/dx k = Thermal conductivity…
Q: A cat's water dish is left outside overnight, where it fills to the brim with water during a…
A: Given The dish holds V0=252 mL of water. Increase in temperature is ∆t=11.6°C Coefficient of volume…
Q: The ventilating fan of the bathroom of a building has a volume flow rate of 30 L/s and runs…
A: Given,volume flow rate , v. = 30 L/sT1 = 12.2°CT2 = 22°CUnit cost of electricity =$0.09/kWhR = 0.287…
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…
Q: 4. Suppose that a bridge is built from pieces of concrete 5.35 m long. If the gaps between pieces…
A:
Q: 3. i A steel rod has a length of 3.000 cm at room temperature (20° C). A brass rod has a length of…
A: Original length of steel rod, Ls=3 cm Original length of brass rod, LB =2.997 cm Coefficient of…
Q: A circular pipe of OD 20 cm is enclosed centrally in a square section insulation of 36 cm side. The…
A: Given-Outer Diameter= 20cm or 0.2mSide of square section=36cm or 0.36mThermal Conductivity (K)…
Q: 4. A box with total wall area of 0.6m2 and wall thickness 3cm is used to cool drinks. The inner and…
A: (i) The relation of the rate is Qt=kA∆T∆xThus, ∆T=Tf-Ti=273.15+50K-0K∆T=50 KQt=0.010 W/m·K0.6 m250…
Q: Two 50g ice cubes are dropped into 200g of water in a thermally insulated container. The water is…
A: Given data: The mass of the 2 ice cubes is mi=2×50 g×1 kg1000 g=0.1 kg The mass of the water is…
Q: #1. Consider a lake in Vermont at the end of summer. At the end of summer, you can assume the…
A: Transfer of Heat Energy: Heat energy can be transferred from one part of space to the other part by…
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