Q: A spherical body of area A and emissivity e=0.5 is kept inside a perfectly black body. Energy…
A: According to Stephan's Boltzman law, P=σAT4 ; for black body P = σeAT4; for any other body
Q: The average kinetic energy of a gas molecule at 100°C is:
A:
Q: 0.0012 3. A 100 gram piece of ice at 0 oC is added to 400 grams of water at 30 oC. Assuming the…
A: Given data: The mass of the piece of ice is m1=100 g. The initial temperature of the ice piece is…
Q: Will the value of specific heat’capacity and specific latent heat of a substance change if the scale…
A: The specific heat capacity will change if the scale is °F instead of °C. This is because it is the…
Q: How can I calculate the specific heat capacity of a metal?
A: Calculation of specific heat capacity requires data from an experiment in which heat is exchanged…
Q: A wall is built of two metals (copper and aluminum) that are in thermal contact with each other. If…
A: Given: temperature difference across both metals = 31.6Kthickness of copper LCu=1.05 cmthickness of…
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A: Recall ∆Q=mc∆T From principle of calorimetry. Heat lost by hotter body=heat gained by colder body
Q: a solid steel sphere of radius 50 cm is heated to 2000 K. If the sphere acts as a perfect radiator,…
A: The equation for the energy radiated by a perfect radiator per unit area per unit time is given by,
Q: Some incandescent light bulbs are filled with argon gas. What is vrms (in m/s) for argon atoms near…
A: Given data: Temperature (T) = 2900 K
Q: The Specific Heat Capacity of Lithium is 3.56 J / g C. What is this Specific Heat Capacity using…
A: solution: given that Specific Heat Capacity of Lithium is 3.56 J / g C.
Q: Suppose that the average velocity (vrms) of carbon dioxide molecules (molecular mass is equal to…
A: Molecular mass, M = 44 g / mole = 0.044 kg/mole vrms = 1.05 x 105 m/s
Q: A spherical blackbody of 5 cm in radius is in equilibrium with its surroundings. It then absorbs…
A: 15) radius (r) = 5 cm power absorbed (P) = 50 kW
Q: The coefficient of volume expansion of glycerine is 49×10-5 K-1. What is the fractional change in…
A: The expression for the volume expansion of the glycerine is
Q: If the temperature of the surface of the object is 501.1 °F , then calculate its value in К.
A:
Q: Show that the thermal resistance of a rectangular enclosure can be expressed as R = Lc /(Ak Nu),…
A: Calculate the thermal resistance of the slab using the relation,
Q: Calculate the thermal conductivity with error. Error for Dave, h and t is all provided below. k is…
A:
Q: If the absolute temperature of a spherical object were tripled, by what factor would the rate of…
A: The radiant heat power emitted is proportional to the fourth power of absolute temperature.
Q: Estimate the thermal conductivity of Applesauce at 35 ° C. (Water content = 75.0% wet basis).…
A: Given : Temperature (T) = 35°C Water content (Xw) = 75% = 0.75
Q: Calculate the power radiated by a cube with a side length of 7.70 cm at the temperature 339 K(about…
A: The power radiated by the cube can be given with the help of Stefan-Boltzmann law as, Here, ε, σ, A…
Q: When a sealed Thermos bottle full of hot coffee is shaken, what changes, if any, take place in (a)…
A: The molecular temperature is directly proportional to the average kinetic energy of the molecules.
Q: If the temperature of the metal surface is 4.2 °F, then calculate its value in Kelvin a. -288.444
A: The formula is F - 32180=K - 273.15100
Q: he rate at which radiant energy from the sun reaches the earth's upper atmosphere is about…
A: The radiation energy per unit area is,
Q: How many kilograms of nickel must be added to 2.4 kg of copper to yield a solidus temperature of…
A:
Q: A walrus transfers energy by conduction through its blubber at the rate of 150 W when immersed in…
A: The rate of heat conduction is given by P=Qt=kA∆Td Rearranging the equation gives d=kA∆TP
Q: A spherical blackbody of 5 cm in radius is in equilibrium with its surroundings. It then absorbs 50…
A:
Q: The intensity of solar radiation reaching Mars averages about 580 W/m2. a) Assuming the Sun radiates…
A: Given information: Here, IM is the intensity at the Mars surface, d is the distance between the…
Q: A sphere of radius 4.3 mm is at 3499 K. Calculate the rate of radiation of energy (in W) by the…
A: Given: The radius of the sphere is 4.3 mm. The temperature is 3499 K. The emissivity is 1.
Q: Calculate the thermal conductivity with error. Error for Dave, h and t is all provided below. k is…
A: Given,
Q: The total power radiated per unit area of temperature T is R. If the temperature increases by 4T,…
A: Write the expression for the radiated power per unit area. Here, P is the power, σ is the Stefan…
Q: What is the change in length in millimeters of a 3.00-cm-long column of mercury if its temperature…
A: Given: Length of the mercury column = 3 cm Initial temperature = 290 C Final temperature = 430 C
Q: and is a The thermal conductivity of a material depends only on the type of constant. If a material…
A:
Q: What is the change in length in millimeters of a 3.00-cm-long column of mercury if its temperature…
A:
Q: If the temperature of the surface of the object is 657.1 K, then calculate its value in °F.
A: Option (b) is correct.
Q: If the temperature of the surface of the object is 648.5 K , then calculate its value in °F. a.…
A:
Q: If the temperature of the surface of the object is 4 K, then calculate its value in °F.
A:
Q: The exact heat capacity of metals at high temperatures is
A: Dulong Petit law - As we know, the heat capacity at high temperatures is given by the Dulong petit…
Q: Q When 3.0 mol Oz is heated at a constant pressure of 3.25 atm, its temperature increases from 260 K…
A: Write the given values of this problem. .Number of moles(n)=3Pressure=3.25 atmT1=260 KT2=285…
Q: A copper sphere initially has a size of 2.98cm³ at 28.52°C. At what temperature (in K) will this…
A: here volume of the copper is given V=2.98 cm3 corresponding temp = 28.52 C increase in volume ∆…
Q: At 20C, a brass cube has edge length 30 cm.What is the increase in the surface area when it is…
A: The change in side length for linear expansion can be written as Since a brass cube has six faces,…
Q: A 32 kg piece of lead is immersed in a container with 5.8 kg of water at 15 ° C. If the temperature…
A: Given, Lead mass, ml=32 kg Water mass, mw=5.8 kg Equilibrium temperature, θ=39.7∘C Standard data,…
Q: If the temperature of the surface of the object is 690.8 K, then calculate its value in "F. O a.…
A:
Q: If the initial temperature of the sample is 63.5°F, what is its temperature in degrees Fahrenheit…
A: Given data: Initial temperature=63.5°F Increase to temperature =44.5°C
Q: Show that β = 3α, by calculating the infinitesimal change in volume dV of a cube with sides of…
A: Thermal expansion is tendency of an object to change its dimension either in length, area and volume…
Q: The thermal contact conductance at the interface of two 1-cm-thick aluminum plates is measured to be…
A: Thermal contact resistance is, Rc=1hc=111000 W/m2·K=9.09×10-5 m2·K/W
Q: The average kinetic energy of a gas molecule at 100 °C is:
A: Temperature (T) = 100° C or T = 273+100 = 373 K
Q: Calculate the thermal conductivity with error. Error for dave, h and t is all provided below. k is…
A: Given,
Q: The melting point of an unknown solid is determined to be 51°C. What is this temperature on the…
A:
Q: If the temperature of the metal surface is 4.2 °F, then calculate its value in Kelvin
A: Given that Tf=4.2°F
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- When lead is melted at atmospheric pressure, the melting point is 327 ° C, the density decreases from 1.101 × 104 to 1.065 × 104 kg m-3 and the latent heat is 24.5 kJ/kg. Estimate the increase in melting point of lead, T (in K), at 76 atm.Earth’s surface absorbs an average of about 960. W/m2 from the Sun’s irradiance. The power absorbed is Pabs = (960. W/m2) (Adisc), where Adisc = π(RE)2 is Earth’s projected area. An equal amount of power is radiated so that Earth remains in thermal equilibrium with its environment at nearly 0 K. Estimate Earth’s surface temperature by setting the radiated power from Stefan’s law equal to the absorbed power and solving for the temperature in Kelvin. In Stefan’s law, assume e = 1 and take the area to be A = 4π(RE)2, the surface area of a spherical Earth. (Note : Earth’s atmosphere acts like a blanket and warms the planet to a global average about 30 K above the value calculated here.)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 the box, estimate the amount of ice remaining after 6h. The outside temperature is 45C, and thermal conductivity of thermocole box is 0.01 Js'm k, knowing thatilatent heat of fusion is 335* 10 J/kg.
- The total power emitted by a spherical black body of radius Rat a temperature T is P,. R Let P, be the total power emitted by another spherical black body of radius kept at 2 temperature 27T . The ratio, is (Give your answer upto two decimal places) P220 g of water is heated at an increase of 2°C per minute. If the amount of water heated for 10 minutes passes into the vapor phase is determined as 8 g, calculate the heat of evaporation of the water according to the data.A spherical blackbody of 5 cm in radius is in equilibrium with its surroundings. It then absorbs 50 Kw of power radiated to it from the surroundings. What is the approximate temperature of the sphere?
- The sensitivity of a thermocouple is 0.05 mV/K. If the voltage range is from 0-50 mV and the lowest temperature that can be measured is 273 K. What is the upper limit of the temperature range (in K)?Estimate the amount of heat (in J) required to raise 2kg of α-iron from room temperature (25∘C) to100∘C.(a) Estimate the specific heat capacity of sodium from the Law of Dulong and Petit. The molar mass of sodium is 23.0 g/mol. (b) What is the percent error of your estimate from the known value, 1230 J/kg · °C ?
- A sample of a serum of mass 26.5 g is cooled from 290 K to 275 K at constant pressure by the extraction of 1.41 kJ of energy as heat. Calculate q and AH and estimate the heat capacity of the sample. report here the heat capacity= J/k.g. 3 sig. numberTemperature-Dependent Heat Capacity At low temperatures, the specific heats of solids are typically proportional to T3. The first understanding of this behavior was due to the Dutch physicist Peter Debye, who in 1912, treated atomic oscillations with the quantum theory that Max Planck had recently used for radiation. For instance, a good approximation for the specific heat of salt, NaCl, is c =3.33× 104 J ⎛ ⎞ kg·k ⎝ T 321 K ΘD, and the formula works well when ⎠ TA nickel plate 0.8 cm thick has a temperature difference of 64°C between its faces. It transmits 200kcal/hr through an area of 10cm2. Calculate the thermal conductivity of nickel in cgs units.