Describe in a few lines the reasoning /rationale for consideration of copper mesh in face masks.
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Q: What is the power (in W) of the heater.
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Q: heat transfer rate
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Q: Needs Complete solution with 100 % accuracy don't use chat gpt or ai plz plz plz plz.
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Describe in a few lines the reasoning /rationale for consideration of copper mesh in face masks.
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- I need help understanding the calculations written in blue and how they got 0.8 and 0.4 for fiber b and how they calculated the answer in blue i need a step by step calculation of how they got 0.232Need help with part #3, please :)You have a Switch LED Lightbulb with the following information: It is equivalent to a 75 Watt incandescent lightbulb. It uses 20 Watts of electricity. It is estimated to last 25,000 hours. It is dimmable. It produces 1,100 lumens of light. It has a color temperature of 2,700K (warm white). Based on this information, calculate the lighting efficiency of this bulb and determine whether this is more or less efficient than a traditional incandescent lightbulb. Group of answer choices 0.018 lumens/Watt, more efficient 55 lumens/Watt, more efficient 0.018 lumens/Watt, less efficient 55 lumens/Watt, less efficient
- When you turn your hot water on in the shower, it takes a bit for the water to get warm. Some of this is because the water in the pipe is cold but some of it is because the water from the hot water heater must heat the copper plumbing pipe itself. Copper has a specific heat of 0.39R. How much energy does it take to heat 2 kilograms of copper pipe from 70°F to 130°F? Report your answer in Joules. (Hint: Note that you'll need to convert kJ to J and F to K.)2. what could be the voltage drop and power loss due to the resistance. If the resistance of a cable is 100ohms, with a current of 20mA ? Voltage drop = 2 volt, power loss = 4*10^-4 wa 3. calculate the attenuation coefficient per kilometer. of an optical cable of length 5 Km, with an input power 50watts and output power 40watts, Enter your answer 4. what should be the pulling tension for 4 pair UTP 6 AWG ?, If a 4 pair UTP 24AWG is used to pull with a maximum tension of 110newtons ? 27.5 newton 5. Find the fiber core radius If the bend radius of fiber optic cable is 4mm,Compute for the amount of heat that a 2.3-liter of sweat can remove from Joe's 70-kg body via evaporation. By how much will Joe's body temperature will rise if this amount of heat cannot be eliminated from his body? Specific heat value is 1 cal/g°C. Consider the sweat as purely water.
- Plz complete solution other wise leave it hanging. I vill down vote if not completed.A 1.82 m wide by 1.11 m high metal plate must be insulated to prevent contact burn injuries. If the heat transfer rate is 136 W and the temperature across the insulation must be reduced from 87.3°C to 40.3°C, what is the minimum thickness (in cm) of insulation required [round your final answer to two decimal places]? {kins = 0.031 W/m∙K}(a) Calculate the rate of heat conduction through house walls that are 13.0 cm thick and that have an average thermal conductivity twice that of glass wool. Assume there are no windows or doors. The surface area of the walls is 120m^2 and their inside surface is at 18.0ºC, while their outside surface is at 5.00ºC. (b) How many 1-kW room heaters would be needed to balance the heat transfer due to conduction?