A body of surface area 10 cm² and temperature 727°C emits 300 J of energy per minute. Find its emissivity.
Q: The radiation energy (intensity of the radiation) reaching Earth from the sun at the top of the…
A: Concept used: Equilibrium temperature of earth depends on amount of heat energy absorbed and…
Q: A single pane of glass in an old home measures 1.14 m by 0.6 m and is 0.01 m thick. During a cold…
A: Given thermal conductivity of the wall k =1.7 W/mK.Given length and breadth of the wall as 1.14 m…
Q: A student is trying to decide what to wear. His bedroom is at 20.0°C. His skin temperature is…
A:
Q: A granite ball of radius 1.92 m and emissivity 0.450 is heated to 118°C. HINT (a) Convert the given…
A: Given data: The given radius of a granite ball, r=1.92 m The given temperature, T=118° C The given…
Q: At what net rate does heat radiate from a 275-m2 black roof on a night when the roof’s temperature…
A:
Q: How much heat is conducted in 1.0 h through an iron plate 2.0 cm thick and 1,000 cm2 in area, the…
A: Given data as per question time t = 1h area = 1000cm2
Q: A steel ball (200mm in diameter) was heated to around 1000°C and was placed inside a vacuum chamber.…
A: According to Stefan Boltzmann law, the amount of radiation emitted per unit time from an area A of a…
Q: An incandescent light bulb with a surface area of 0.0130 m2 and an emissivity of 0.9 has a surface…
A:
Q: A 1.88-m (6 ft 2 in.) man has a mass of 81 kg, a body surface area of 1.8 m², and a skin temperature…
A: Height of the body, Mass of the body, The surface area of the body, Skin temperature, The emissivity…
Q: A sphere of radius 0.500 m at 18.0 °C is placed in the outside on a hot summer day at 40.0 °C. The…
A:
Q: Betelgeuse, a bright red star in the constellation Orion, has a luminosity that is 100,000 times…
A: Luminosity of the sun is 3.916×1026 WBetelguese has a luminosity, 100000×3.916×1026=3.916×1031 W The…
Q: Radiation makes it impossible to stand close to a hot lava flow. Calculate the rate of heat transfer…
A: Given Data The area of the cross-section is A = 1 m2. The temperature of fresh lava is Tl = 1100°C.…
Q: A piece of unknown substance weighs 51.9 g and requires 3040 J to increase its temperature from…
A: Given: The amount of heat provided, q=3040 J Mass of the substance, m=51.9 g Temperature change,…
Q: An incandescent light bulb with a surface area of 0.0137 m2 and an emissivity of 0.93 has a surface…
A: Solution-Given thatSurface area of incandescent light bulb (A) = 0.0137 m2Emissivity (ε)=…
Q: How much heat (in cal) is needed to heat a container of water (with a mass of 5.5 kg) (specific heat…
A:
Q: 950 g of preheated pizza (at 295.15 K) cools down after 45 minutes left in the kitchen. If the…
A: As per Newtown's law of cooling the rate at which any body cools is proportional to the difference…
Q: standing inside a room at 21.3 °C, the surface temperature of your skin is 34.12 °C. Your skin has…
A: heat loss=σeAT⁴
Q: An incandescent light bulb with a surface area of 0.0145 m2 and an emissivity of 0.87 has a surface…
A:
Q: A sphere of radius 0.246 m, temperature 40.5°C, and emissivity 0.893 is located in an environment of…
A: a) radius of sphere (r)= 0.465 m surface area of sphere (A) = 4r2…
Q: An object has an emissivity of 0.725. At temperature T, it radiates heat at a rate of 10.W. What is…
A:
Q: 6. 11 088 J of heat energy are needed to raise the temperature of 1.6 kg of copper from 7 °C to 25…
A: Energy is given as, Mass is given m = 1.6 kg.Initial temperature Final temperature
Q: A steel ball (200mm in diameter) was heated to around 10000d C and was placed inside a vacuum…
A:
Q: The tungsten filament of a certain 100 W lightbulb radiates 2.00 W of light (electro- magnetic…
A:
Q: What is the cost of heating water in a swimming pool of radius 3.5m and depth 1.3 m from 13°C to…
A:
Q: The tungsten filament of a light bulb has an operating temperature of about 2100 K. If the emitting…
A:
Q: What is the rate of heat transfer by radiation, with an unclothed person standing in a dark room…
A: Heat transfer can take place without any medium. This type of heat transfer is known as heat…
Q: bulb (spherical in shape) has a surface temperature of 140deg C when the room air temperature is at…
A: Given50 W incandescent light bulb(spherical in shape)Surface temperature of bulb, T1=140…
Q: Assume that the total surface area of a person's body is 1.6 m2 and his skin temprature is 13.8 °C…
A: Given: Total surface area of a person's body is A=1.6m2. Skin temperature is T=13.8°C. Stefan…
Q: A sphere of radius 0.278 m, temperature 32.7°C, and emissivity 0.810 is located in an environment of…
A: Given that, The surface area of the sphere is A=4πr2=4π×(.278)2=0.97 m2…
Q: 8. Go A closed box is filled with dry ice at a temperature of – 78.5 °C, while the outside…
A: Given: The temperature of the dry ice = -78.50 C Outside temperature = 210 C The thickness of the…
Q: Questions 13 through 14 pertain to the situation described below: A 73.0-kg man is in an environment…
A: (13) Given data The mass of the man is m = 73 kg The environment temperature is T∞ = -10°C The…
Q: Find the heat flow in 30.0 days through a 0.25-cm thick steel plate with cross section 45 cm x 75…
A:
Q: cerned mother is dressing her child for play in the snow. The child's skin temperature is 33.0°C,…
A:
Q: At what net rate does heat radiate from a 275-m2 black roof on a night when the roof's temperature…
A:
Q: If the body’s surface temperature is 35 degrees Celsius, what is the net rate of heat loss on a…
A: Using Stefan‒Boltzmann law in the form : P = εσA [ T₂ ⁴ ‒ T₁ ⁴ ] -(1) here ε = 0.97…
Q: The heat required to melt a block of ice is 1165500 J. Estimate the total heat required to vaporize…
A: Given data: The heat required to melt is Q=1165500 J. The temperature of water is T=50°C.
Q: If 122.6 kJ of heat are added to 9.00 x 102 g of water at 22.0°C, what is the final temperature of…
A: The heat supplied(q) to any substance is given as, where m is the mass of the substance in Kg, c is…
Q: If a penny was made of pure copper (of course it really is not), and weighed 2.35 g, how much heat…
A: Given: The mass of the penny is 2.35 g. The initial temperature is 20oC.
Step by step
Solved in 2 steps
