W= 75 Ib W= 150 lb W= 75 Ib R.
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- Hello, Please listen to me carefully. I need "What is the temperature of the Sun (google for the answer)? What is there-entry temperature of the Space Shuttle (google for the answer)? Whydon’t you burn up at the reentry temperature that you’ve calculated for thisMach 20 flow? The answer to this question will lead you to recognize thatFigure 4.6 is wrong and that the body should actually re-enter the Earth’satmosphere in the opposite direction. (ie.. blunt/flat surface first.)" to be answered based on the main question ******Dont solve for the main question as I dont want it. ******1. The boiling temperature of water is 100 °C. If you put boiling water in a mugplaced at the table top, you observed that after some time the water cools down,decreasing the temperature of water in the mug. Why is this so? Explain using theZeroth Law of Thermodynamics. What happens to objects when temperature increases? For instance, a jar cover an be removed by putting the cover in hot water. Why is this so?Heat Transfer Questiion is image a) Calculate the emitted heat flux from the surface in W/m2 blank
- Solar radiation is incident on the glass cover of asolar collector at a rate of 700 W/m2. The glass transmits88 percent of the incident radiation and has an emissivityof 0.90. The entire hot water needs of a family in summercan be met by two collectors 1.2 m high and 1 m wide. Thetwo collectors are attached to each other on one side so thatthey appear like a single collector 1.2 m * 2 m in size. Thetemperature of the glass cover is measured to be 35°C on aday when the surrounding air temperature is 25°C and thewind is blowing at 30 km/h. The effective sky temperaturefor radiation exchange between the glass cover and the opensky is 240°C. Water enters the tubes attached to the absorberplate at a rate of 1 kg/min. Assuming the back surface of theabsorber plate to be heavily insulated and the only heat lossto occur through the glass cover, determine (a) the total rateof heat loss from the collector, (b) the collector efficiency,which is the ratio of the amount of heat transferred to…40% of incident radiant energy on the surface of thermally transparent body is reflected back, if the transmissivity of the body be 0.15 then emissivity of the surface is–For which solid is the lumped system analysis more likely to be applicable: an actual apple or a golden apple of the same size? Why?
- The temperature on the two surfaces of a 25mm thick steel plate (k=48w/m°c)The solar power striking Earth every day averages 168watts per square meter. The highest ever recorded electricalpower usage in New York City was 13,200 MW. A recordestablished in July of 2013. Considering that present technologyfor solar energy conversion is about 10% efficient,from how many square meters of land must sunlight becollected in order to provide this peak power? (For comparison,the total area of New York City is 830 km2.)The boiling temperature of nitrogen at atmospheric pressure at sea level (1 atm pressure) is -196 °C. Therefore, nitrogen is commonly used in low-temperature scientific studies since the temperature of liquid nitrogen in a tank open to the atmosphere will remain constant at -196 °C until it is depleted. Any heat transfer to the tank will result in the evaporation of some liquid nitrogen, which has a heat of vaporization of 198 kJ/kg and a density of 810 kg/m3 at 1 atm. Consider a 3-m-diameter spherical tank that is initially filled with liquid nitrogen at 1 atm and -196 °C. The tank is exposed to ambient air at 15° C, with a combined convection and radiation heat transfer coefficient of 35 W/m2⋅K. The temperature of the thin-shelled spherical tank is observed to be almost the same as the temperature of the nitrogen inside. Determine the rate of evaporation (in kg/s) of the liquid nitrogen in the tank as a result of the heat transfer from the ambient air if the tank is insulated with…
- Can these questions be answered in mathematical format using the 1 cm and 10MHz described in the image instead of wordsThe heat transfer was calculated to be 6.770 kilowatt, but the problem also asks to calculate the temperature of the outer most surface. What is the temperature of the outer most surface?A tank 3.5 m long and 2.5 m wide contains alcohol of relativedensity 0.82 to a depth of 3 m. A 50 mm diameter pipe leadsfrom the bottom of the tank. What will be the reading on agauge calibrated in Pa connected at a point (a) 150 mm abovethe bottom of the tank; (b) in the 50 mm diameter pipe, 2 mbelow the bottom of the tank; (c) at the upper end of a 25 mmdiameter pipe, connected to the 50 mm pipe 2 m below thebottom of the tank, sloping upwards at 30◦to the horizontalfor 1.2 m and then rising vertically for 600 mm? What is theload on the bottom of the tank?