The surface of the Sun is at a temperature of 6000 K. At what rate is energy radiated from the Sun striking the Earth? Assume the emissivity of the Sun is 1. The Stefan-Boltzmann constant is 5.67 x 10-8 J/s m² K*.
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- A 240 m/s projectile with specific heat c = 0.128 J/gK lodges in a slab of ice at 00C. How much of the ice melts if the projectile is initially at 350C and has a mass of 4.5 g?After sitting on a shelf for a while, a can of soda at a room temperature (73∘73∘F) is placed inside a refrigerator and slowly cools. The temperature of the refrigerator is 37∘37∘F. Newton's Law of Cooling explains that the temperature of the can of soda will decrease proportionally to the difference between the temperature of the can of soda and the temperature of the refrigerator, as given by the formula below: �=��+(�0−��)�−��T=Ta+(T0−Ta)e−kt ��=Ta= the temperature surrounding the object�0=T0= the initial temperature of the object�=t= the time in minutes�=T= the temperature of the object after �t minutes�=k= decay constant The can of soda reaches the temperature of 53∘53∘F after 30 minutes. Using this information, find the value of �k, to the nearest thousandth. Use the resulting equation to determine the Fahrenheit temperature of the can of soda, to the nearest degree, after 60 minutes. Enter only the final temperature into the input box.Consider an insulated container containing 2.56-kg ice at -11°c. Inside the container, there is a spherical object with radius 36 cm and at a certain temperature of 14396°C. Calculate the time (in hours) where all the ice has melter. Assume that sphere is a black body. Use the following: pi= 3.14 c_water = 4190 J/kgk, c_ice = 2100 J/kgK, Lf = 334,000 J/kg, o = 5.6704e (-8) W/m²K4. Final answer in TWO decimal places.
- A student in a lecture hall has 0.320 m2 of skin (arms, hands, and head) exposed. The skin is at 34.0°C and has an emissivity of 0.970. The temperature of the room is 29.5°C (air, walls, ceiling, and floor all at the same temperature). The Stefan–Boltzmann constant is 5.670 × 10−8 W/ (m2. K4 ). A) At what rate does the skin emit thermal radiation? in W B) At what rate does the skin absorb thermal radiation? in W C) At what rate does the skin absorb thermal radiation? in W D) Compare this to the total rate of heat flow from the body, which is about 100 W.______ % of total rateThe Sun has a diameter of approximately 1.4 x 109 m and a surface temperature of about 5650 C. Assuming that the Sun radiates as a blackbody with emissivity of unity, calculate the power radiated by the Sun into the solar system, which you can assume is at the temperature of the microwave background radiation.A cylindrical surface of radius 57 cm and length 1.2 m maintained at a temperature of 142°C is continuously emitting radiations. If the emissivity of the surface is 0.83. (consider: Stefan's constant σ = 5.67 x 10-8 W/m2T4) Calculate the rate of heat energy radiated in Watts = Answer
- The sun has a temperature of 6000 K and a radius of 6.07 x 10^18 m^2. What is the heat current if it has an emissivity of 1. The Stefan-Boltzmann constant is 5.67 x 10^-8 W/m?K4 8.89 x 10^26 W O 2.76 x 10^25 w O 1.98 x 10^7 W O 4.46 x 10^26 wWhat amount of energy is required to change a spherical drop of water with a diameter of 1.60 mm to five smaller spherical drops of equal size? The surface tension, y, of water at room temperature is 72.0 mJ/m². ΔΕΞ 0.00015 Incorrect mJThank you! Required info: A student in a lecture hall has 0.310 m^2 of skin (arms, hands, and head) exposed. The skin is at 34.0°C and has an emissivity of 0.970. The temperature of the room is 20.2°C (air, walls, ceiling, and floor all at the same temperature). The Stefan-Boltzmann constant is 5.670 x 10-8 W/ (m2. k4). a) what is the net rate of heat flow from the body due to thermal radiation? b) compare this to the total rate of heat flow from the body, which is about 100 W.
- On a certain day, the temperature dropped from 480F to 170F in 6 hours. What is the temperature change in 0C and in K? a) ∆TC = 17.220C, ∆TK = 17.22K. b) ∆TC = 310C, ∆TK = 31K. c) None of these.Please help! A student in a lecture hall has 0.310 m^2 of skin (arms, hands, and head) exposed. The skin is at 34.0°C and has an emissivity of 0.970. The temperature of the room is 20.2°C (air, walls, ceiling, and floor all at the same temperature). The Stefan-Boltzmann constant is 5.670 x 10-8 w/ (m2. k4 ). a) at what rate does the skin emit thermal radiation? b) at what rate does the skin absorb thermal radiation? THANK UWhat is the net heat current in radiation of an Ice cube at 0 °C if the surrounding air is at 20°C? The ice cube has sides of length 2.50 cm, the emissivity of ice is 0.96 and the Stefan-Boltzmann constant is o = 5.67 x 10-8 Watts/m2Kª. Is the heat flow out or into the ice cube, explain?