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: (1a). Figure shows a copper rod AB being heated at one end. Explain how the heat transfers from A to…
A: we consider earth as a black body so we will evaluate heat emitted by black body at temprature T .
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Q: Nuclear fusion - the energy source of the Sun, hydrogen bombs, and fusion reactors - occurs much…
A: Given average kinetic energy of the atoms is K.E.= 5.65 × 10-14 J
Q: Ex. 80 : A copper sphere of diameter 20 cm is coated with lampblack and maintained at a temperature…
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Q: The amount of radiant energy emitted by a surface is given by q = ɛ0 AT+ where q represents the rate…
A: Dimensional Analysis Dimensional Analysis is a method of studying the dimensions of complex physical…
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: Spaceman Spiff is flying his spacecraft near a neutron star. Assuming the star is located at (0, 0,…
A: The temperature at a point is given by T=5.0×106 e-3x2-3y2-3z2 The temperature gradient is…
Q: Q.2/A thermocole cubical ice box of side 30 cm has a thickness of 5.0 cm. If 4.0 kg of ice is put in…
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Q: Consider a surface at a uniform temperature of 800 K. Determine the maximum rate of thermal…
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Q: Suppose you want the nuclei in your fusion experiment to have average kinetic energies of 6.55 ×…
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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: The figure shows (in cross section) a wall consisting of four layers, with thermal conductivities k₁…
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Q: The temperature of the surface of the Sun is 5500°C. Part (a) What is the average kinetic energy,…
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Q: The radiation energy (intensity of the radiation) reaching Earth from the sun at the top of the…
A: Given: The Radiation Intensity reaching Earth 1.36×103 Emissivity 0.8 To find: The equilibrium…
Q: To help keep his barn warm on cold days, a farmer stores 860 kg of solar-heated water (Lf = 3.35E+5…
A: Given Mass of the water m =860 kg so the energy released by the water from cooling this to 11.8oC…
Q: Ex. 79: Calculate the quantity of heat emitted in 5 minutes by a black cube each of side 5 cm long…
A: To find-Heat emitted (Q)=?Given-Time (t)=5 min=5×60 sec=300 secLength of each side (l)=5 cm=5×10-2…
Q: The average temperature of the atmosphere has increased by 0.4°C over the last thirty years.…
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Q: Nuclear fusion (the energy source of the Sun) requires the fusing particles (usually protons) have…
A: average kinetic energy = 2.3×10-13 Joules
Q: A star has a power output of 2.5 x 1026 W and a radius of 8.92 x 108 m. Calculate the surface…
A: A black body is an ideal body that is capable of absorbing all the radiation that falls on it. For…
Q: The number density of gas atoms at a certain location in the space above our planet is about…
A: Using Ideal gas law,
Q: At "low" temperatures, the heat capacity of some materials varies with temperature as 12π¹ NkB C (T)…
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Q: Nuclear fusion - the energy source of the Sun, hydrogen bombs, and fusion reactors - occurs much…
A: The average translational kinetic energy is given by
Q: A spherical blackbody of 5 cm in radius is in equilibrium with its surroundings. It then absorbs 50…
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Q: Satellites designed to observe the radiation from cold (3 K) dark space have sensors that are shaded…
A: In heat transfer, conduction is the mode of heat transfer that allows the transfer of heat through…
Q: Suppose a person is covered head to foot by wool clothing with average thickness of 2.25 cm and is…
A: Given data: Average thickness, d=2.25 cm=2.25×10-2m Energy transferred, Q=3000 J Time interval, t=2…
Q: What is the Vrms of hydrogen on the surface of the sun if its temperature is 5.44E3 degC? Number…
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Q: A. The planet Venus is different from the earth in several respects: (a) it is only 70 % as far from…
A: A. Given,The planet is 70% as far from the sun, the solar constant σs is 2800 W/m2.The cloud…
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: Our sun, currently a yellow dwarf, will eventually evolve to a red giant star and then to a white…
A: Determine the area of the white dwarf.
Q: Some amount of heat energy is removed from a 10cm X 20cm X 43cm block of ice to cool from 0°C to…
A: Given that -- Some amount of heat energy is removed from a 10cm X 20cm X 43cm block of ice to cool…
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: At midday when a shopping center with a flat black roof is directly under the Sun, it receives 1,000…
A: Given, The power received from the sun, P = 1000 W (per square meter) the emissivity of the surface,…
Q: Q3 Using the following values, together with equation 5, calculate the power emitted by the Sun.…
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Q: 24. The Kelvin temperature of an object is T1, and the object radiatesa certain amount of energy per…
A: Given: The initial Kelvin temperature of object is T1. The final Kelvin temperature of object is T2.…
Q: Before going in for an annual physical, a 70.0-kgkgperson whose body temperature is 37.0∘C Consumes…
A: Given:Mass of the person = 70 kgTemperature of the person = 37o C…
Q: Problem 4. A perfectly insulating thermos bottle is filled with 500 g of water at a tem- perature of…
A: Th principle of calorimetry states that for an insulated system, the heat gained by a body will be…
Q: Our sun, currently a yellow dwarf, will eventually evolve to a red giant star and then to a white…
A: Assume that the sun radiates like a blackbody, Stefan-Boltzmann law, P = σAT4where, σ is…
Q: 9. In an experiment, a 0.290-kg piece of ceramic superconducting material at 19 °C is placed in…
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Q: Rate of cooling of a body is 20C/min at temperature of 600C and 10C/min, when it is at 450C. What…
A: To answer: The temperature of the surrounding.
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