In a few sentances, explain the parameters absorptance (a) and emittance (ɛ) and how we use them to control the temperature of our spacecraft.
Q: The escape velocity from the Moon is much smaller than from Earth and is only 2.38 km/s. At what…
A: The escape velocity of the moon,(VM)=2.38 km/s=2.38 x 103 m/s ----(1) [Given] [Using 1 km=103 m]…
Q: Sirius B is a white star that has a surface temperature (in kelvins) that is four times that of our…
A: Surface temperature of Sirius B is ; here is surface temperature of the Sun.The power radiated by…
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: The surface of the Sun has a temperature of 5500 °C. Treating the Sun as a perfect blackbody, with…
A: We are aware that the sun's surface temperature is 5500oC.The sun has an emissivity of 1.0.The sun…
Q: solar panels have an emissivity of e=0.465. When in direct sunlight they absorb energy at rate of…
A: Given The emissivity of the solar panel is e = 0.465. The rate of energy observation is Q/t = 857…
Q: (1a). Black body has emissivity value of 1, but in reality, the emissivity of real objects is less…
A: Given: Radius,R=220mm=220×10-3mTemperature of tungsten,TT=290C=29+273.15K=302.15KPower,P=105WRoom…
Q: An expensive vacuum system can achieve a pressure as low as 1 ×10-´N/m² at 20 °C. How many atoms are…
A: The pressure,
Q: Given that the temperature at the surface of the sun is 5800 K and assuming the sun to be a…
A:
Q: (1a). Black body has emissivity value of 1, but in reality, the emissivity of real objects is less…
A: A black body is an ideal body that absorbs or emits all of the radiation(of all wavelengths) plus it…
Q: ou are in space, compare the rate of heat loss for bare skin vs. a nice thick layer of…
A: Average mass of human m=75 kg and average/room temperature T=298 K. Specific heat of human body…
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: 50 kg of ice at -5°C is dropped in to a big lake at 0°C. (Assume that the lake is big enough for the…
A:
Q: Use the value of the solar energy flux on Earth to determine the radius of the Sun. Assuming that…
A:
Q: hat all the energy ends up in the water. Something to think about: why is no heat involved in this…
A:
Q: What must be the value of the height in m so that the water temperature increases by 0.5 [°C]
A:
Q: 200 kg of water at 0o C is in an insulated container. A .500 kg sample of iron (448 J/kg-C) at 100oC…
A: It is given that,
Q: A computer in a well-sealed and well-insulated (thermally) room, dissipates energy at a rate of…
A:
Q: If the atmosphere is isotropic (the same temperature) at 293 K, how high will a balloon rise if, at…
A: The ideal gas law may be used to estimate the correlation between the gas's pressure, volume, and…
Q: The average temperature of the atmosphere has increased by 0.4°C over the last thirty years.…
A:
Q: The escape velocity of any object from Earth is 11.2 km/s. (a) Express this speed in m/s and km/h.…
A:
Q: (1a). Black body has emissivity value of 1, bu reality, the emissivity of real objects is less tl…
A: 1. black body has emissivity value is 1
Q: The escape speed from the Moon is much smaller than from Earth and is only 2.38 km/s. At what…
A:
Q: At 12 km in the standard atmosphere, the pressure, density, and temperature are 1.9399 x 104 N/m²,…
A: According to the standard atmospheric model, the pressure and temperature decrease with increasing…
Q: (a) What is the average kinetic energy in joules of hydrogen atoms on the 5500°C surface of the Sun?…
A: Law of Equipartition of energy states that for any system which is in thermal equilibrium, total…
Q: Among the highest and lowest natural air temperatures claimed are 136∘F in the Libyan desert and…
A:
Q: A diver 60 mm deep in 10∘C∘C fresh water exhales a 1.5 cmcm diameter bubble. What is the bubble's…
A:
Q: The escape speed from the Moon is much smaller than from Earth and is only 2.38 km/s. At what…
A: The escape speed=2.38 km/s=2380 m/s. The molecular mass of chlorine molecules is M=70.91…
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: What is the average kinetic energy in joules of hydrogen atoms on the 5500oC surface of the Sun? (b)…
A:
Q: A container holds 1.0g of argon at a pressure of 8.0atm How much heat is required to increase the…
A: The number of moles of the Argon is, n=mM=1.0 g39.9 g/mol=0.025 mol The molar heat capacity at…
Q: Star A has twice the radius and triple absolute temperature of star B. What is the rati of the power…
A:
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: A small spinning asteroid is in a circular orbit around a star, much like the earth's motion around…
A: P=σAT4T=PσA14
Q: The Sun radiates like a perfect black body with an emissivity of exactly 1. (a) Calculate the…
A: (a) Radius, R = 7 x 108 m Power, P = 3.8 x 1026 W Let the surface temperature of sun is T. By…
Q: The surface of the Sun has a temperature of about 5 800 K. The radius of the Sun is 6.96 × 108 m.…
A: Solution
Q: On a hot summer day, a student turns his fan on when he leaves his room in the morning. When he…
A: The fan makes us feel cooler due to the process of evaporation taking place on the skin of our…
Q: Q4: If the power radiated per square centimetre from the skin is equal 0.05 w\ m2 fluid the skin…
A:
Q: Sirius B is a white star that has a surface temperature (in kelvins) that is four times that of our…
A:
Q: (1a). Figure shows a copper rod AB being heated at one end. Explain how the heat transfers from A to…
A:
Q: Show that the surface temperature, T, of a rotating spherical body at a distance R from the Sun…
A:
Q: A child has a temperature of 101°F . If her total skin area is 19 m², find the energy loss per…
A:
Q: Unreasonable Results - A meteorite 1.20 cm in diameter is so hot immediately after penetrating the…
A: diameter, d = 1.2 cm radius, r = 0.6 cm Power, P = 20 kW emissivity, e = 0.8 Temperature of…
In a few sentances, explain the parameters absorptance (α) and emittance (ε) and how we
use them to control the temperature of our spacecraft.
Step by step
Solved in 2 steps
