Ex. 85: A black body at 1000°C radiates 10 watts per sq: cm of its surface. The solar surface radiates 10 kW per sq. cm. Assuming Sun's surface to be perfectly black, estimate its temperature.

Q: It takes 5000 J of energy to raise the temperature of a 1.5 kg sample of an unknown material by…

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Q: Air at 22°C is blown over a hot pipe with a surface area of 3.19 m2 to dissipate 927 W of heat…

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Q: Cybermen land on Earth. On their temperature scale, at standard Pressure the ice point of water is…

A: Given value--- ice point = 80 degree B. steam point = 560 degree B. We have to find--- If their…

Q: 2.) The escape velocity of any object from Earth is 11.1 km/s. At what temperature would oxygen…

A: THE VALVES PROVIDED IN THE QUESTION ARE AS FOLLOWS- υrms = 11.1 kms=11.1 ×103ms MO2=…

Q: Ex. 80 : A copper sphere of diameter 20 cm is coated with lampblack and maintained at a temperature…

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Q: 2. A student followed strictly correct procedure in the lab during the experiment of determination…

A: ∆P1 = 100.5 mV ∆P2 = 23.8 mV The pressure in the lab is P0 = 101.30 kPa. Find: The pressure P₁: =? ,…

Q: Estimate the energy per second (power) radiated from the Sun assuming its surface temperature is…

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Q: Ex. 123 : A black body at 327°C when suspended in black enclosure at 27°C cools at a certain rate.…

A: Given: Final Temperature,TF=3270C=327+273.15K A black body, also known as a blackbody, is a…

Q: You have been told that a Spherical pellet is initially at temperature of 200 C at and then a gas…

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Q: Suppose the sun was twice its current temperature. Recall, the sun is 7 x 105 km in radius, with a…

A: The expression for temperature on earth is ,                     T= Rsun24D21/4TsunIn this equation,…

Q: (1a). Figure shows a copper rod AB being heated at one end. Explain how the heat transfers from A to…

A: 1a) Answer- In the above figure AB rod is heated at one end  This is a solid copper wire. So, in…

Q: Italian pizza is generally made in a stone wood-fired oven and it is cooked at very high…

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Q: 43. The escape velocity from the Moon is much smaller than from Earth and is only 2.38 km/s. At what…

A: Solution:-Given thatEscape velocity from moon (Vesc)=2.38 km/s=2380 m/sMolecular mass of Hydrogen…

Q: An expensive vacuum system can achieve a pressure as low as 1 x 10 N/m² at 20 °C. How many atoms are…

A: Pressure is Temperature is Boltzmann's constant is Note:Find:Number of atoms in a cubic centimeter.

Q: If a cup of coffee has temperature 95∘C95∘C in a room where the temperature is 20∘C,20∘C, then,…

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Q: at Of A black body radiates heat energy the rate of 1.0x10⁰ joule per second per meters at the…

A: Any incident electromagnetic radiation, regardless of frequency or incidence angle, is absorbed by…

Q: from the sun is D = 150 million km. Using the equation to model the temperature of R² the earth,…

A: Here temperature of the earth                                  Te=…

Q: Experiment :LEE’S DISC I want the Analysis for this experiment

A: Experiment : LEE’S DISC The experiment is to determine the thermal conductivity of the bad…

Q: Q1. Compute potential difference in thermal equilibrium between region where no = 1017 cm-3 and n, =…

A: Write the expression for the potential difference. Here, kT is the thermal energy, e is the charge…

Q: 13. A hot sphere of radius 0.040 m and an emissivity of 0.80 has a surface temperature of 500 K. How…

A: The energy radiated by a surface at temperature T with emissivity ε is given by  E=εσAT4t where…

Q: A 1400 kg car moving at 115 km/h could be converted entirely into heat. What amount of water could…

A: The objective of the question is to find out the amount of water that can be heated from 25 degrees…

Q: Suppose 160 W of heat flows by conduction from blood vessels under the skin to the body's surface…

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Q: 2. At a pressure of 1 atm = 1.01 x 105 Pa, water boils at a temperature of 100° C. At what pressure…

A: Clausius-Clapeyron equation: This equation relates the vapor pressure of a liquid at two different…

Q: Calculate the relative humidity over spherical droplets of pure water

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Q: Calculate the amount of radiation emitted for a unit surface (1 m2) for a white ball at 53°C and…

A: Given data, Surface Area (A)=1 m2 Temperature (T)=530C Emissivity (ε)=0.12

Q: The number densityN/Vof gas molecules at a certain location in the space above our planetis about…

A: Formula o pressure in terms of number density is as follows; P=nkT…

Q: I. Radiation (Heat Current) 17. A hot sphere of radius 0.040 m and an emissivity of 0.80 has a…

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Q: The solution is already provided and my question is how did they calculate the temperature? How come…

A: The gain of noiseless amplifier is given as, Gain=60 The bandwidth of noiseless amplifier is given…

Q: How much heat (in joules) is required to raise the temperature of 24.4 kg of water from 19 ∘C to 88…

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Q: Of A black body radiates heat energy at rate of 1.0×105 joule per second. per meters at the…

A: The first temperature of the black body is given as, T1=127 oC The rate of heat energy of the black…

Q: 2.a. What is the total Power emitted (in the form of electromagnetic radiation) by a solid…

A: emissivity e = 1 radius r =0.70 mtemperature T = 1280 Kstefans constant σ = 5.67 x 10-8

Q: 1. A block of iron with a mass of 2.00 kg is initially at a temperature of 600∘C. It is dropped into…

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Q: Suppose that a planet with no atmosphere orbits a Sunlike star at the same radius as the Earth’s…

A: Given the planet is orbiting around a Sun-like star. Also, given the 40% of the light reflects. Let…

Q: A bowl contains 24 kg of punch (essentially water) at a warm 25°C Part A What is the minimum amount…

A: Mass of punch , m = 24 kg Initial temperature , T = 25 0C . To find = mass of ice needed