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: 9. An automobile tire is inflated with air originally at 10.0 °C and normal atmospheric pressure. At…
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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: A 5-kg iron block released from a height of 200 m, reaches the ground at a speed of 30 m/s. What is…
A: Relation between heat transfer and temperature change is given by- Q=mc∆T, where-Q is heat transferm…
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Q: 15. Which one or more of the following techniques can be used to freeze water? A. Cooling the water…
A: The option A, is the technique in which the water normally freezes at normal atmospheric pressure.
Q: rson transfer thermal energy to reduce mperature to 37.0°C in 30.0 min, assu ntinues to produce…
A: Given: Mass is 80 kg Ti=40oC Tf=37oC C=3500 J/KgoC ∆t=30 mns=1800s P=150W
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: 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: 8. A 2.50-kg piece of aluminum that has a temperature of –150 °C is added to 1.30 kg of water that…
A: mass of aluminum (m) = 2.5 kg Initial temperature of aluminum = - 150oC mass of water = 1.30 kg…
Q: 1. A quartz sphere is 15.0 cm in diameter. What will be its change in volume if its temperature is…
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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: 1. Following vigorous exercise, the body temperature of a person weighing 85 -kg is 41 °C. At what…
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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: The wall of a house consists of three layers: a wooden outer wall with an R factor of 2.00, a 3-in…
A: To calculate the rate of heat loss through the wall section, we can use the formula for heat…
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: The Eiffel Tower in Paris is 984.5 ft tall and is made mostly of steel. a) If this is its height in…
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Q: 20. "Magic Juice" is 50 % liquid carrot juice and 50% water. A vendor buys agic juice at P 100…
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Q: 3. Suppose that the rod is made up of 0.50 m iron rod, 0.50 m copper rod, and 0.50 m aluminum rod…
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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: 8. Concrete sidewalks are always laid in sections, with gaps between each section. For example, the…
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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…
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Q: 3. Consider that immediately after sunset the surface of the Earth is at a temperature of 20° C and…
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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: 12. To help prevent frost damage, 4.00 kg of 0°C water is sprayed onto a fruit tree. (a) How much…
A: To answer: (a) The heat transfer (b) The decrease in the amount of heat.
Q: 5. A thermally isolated vessel contains 100 g of water at 0°C when air above the water is pumped…
A:
Q: 10. Concrete sidewalks are always laid in sections, with gaps between each section. For example, the…
A:
Q: Most automobiles have a coolant reservoir to catch radiator fluid that may overflow when the engine…
A: It is given that,
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: 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: Given
A: In the given question they need a reason why most of the heat is in the climate system is resides…
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…
Q: Q2/ air at 25 °C and 1 atm flows over flat plate at 20 m/s. the plate is 75 mm long and it is…
A: Heat transfer rate is given by, q=h¯A(TS−T∞) Here A is the area of the plate. To calculate h we need…
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