Let the cylinder (hollow) in the figure has variable heat generation which is
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A: As per Bartleby's policy in case of multiple questions I can solve only first one. Please repost…
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A: for solution refer below images.
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Q: Consider a heat engine with a piston chamber that has a diameter of 30 mm, a cold reservoir at 285 K…
A: heat engine with a piston chamber that has a diameter of 30 mm, a cold reservoir at 285 K and hot…
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- 3.17 A 1.4-kg aluminum household iron has a 500-W heating element. The surface area is . The ambient temperature is 21°C, and the surface heat transfer coefficient is . How long after the iron is plugged in does its temperature reach 104°C?1.67 In beauty salons and in homes, a ubiquitous device is the hairdryer. The front end of a typical hairdryer is idealized as a thin-walled cylindrical duct with a 6-cm diameter with a fan at the inlet that blows air over an electric heating coil as schematically shown in the figure. The design of this appliance requires two power settings, with which the air blown over the electric heating coil is heated from the ambient temperature of to an outlet temperature of and with exit air velocities of 1.0 m/s and 1.5 m/s. Estimate the electric power required for the heating coil to meet these conditions, assuming that heat loss from the outside of the dryer duct is neglected.The tip of a soldering iron consists of a 0.6-cm- diameter copper rod, 7.6 cm long. If the tip must be 204C, what are the required minimum temperature of the base and the heat flow, in watts, into the base? Assume that h=22.7W/m2KandTair=21C.
- The wall of a house, 7 m wide and 6 m high is made from 0.3 m thick brick withk=0.6 W/m.K. The surface temperature on the inside of the wall is 16C and that onthe outside 6C. Find the heat flux through the wall and the total heat loss through it.A potato slice that is 1⁄4” inch thick is placed on a pan that is 212F. The slice has a thermal conductivity of 0.318 Btu/hr-ft-F, and an area of 4 sq in. What is the rate that it heats up if it is initially at 75F?give two example and explanation of thermal energy transformation at constant volume, pressure and heat that happen in daily
- What is the heat transfer rate of initial temperature of 26 degree Celsius and the final temperature is 85 degree Celsius.(a) Calculate the rate of heat transfer by radiation from a car radiator at 110°C into a 50.0ºC environment, if the radiator has an emissivity of 0.750 and a 1.20-m^2 surface area. (b) Is this a significant fraction of the heat transfer by an automobile engine? To answer this, assume a horsepower of 200hp (1.5kW) and the efficiency of automobile engines as 25%.A heat reservoir at 900 K is brought into contact with the ambient at 300 K for a short time Dunng this period 9000 kJ of heat is lost by the heat reservoir. The total loss inavailability due to this process is
- Consider a heat engine with a piston chamber that has a diameter of 30 mm, a cold reservoir at 285 K and hot reservoir at 350 K. It is also equipped with a metal can cylinder that has a volume of 0.0002 m3. What is the next step in the heat engine cycle if the metal cylinder is already in the cold tank with a 200 g weight on top of the piston300 kg of fruits are supplied to a cold storage at 25°C The cold storage is maintained at -5°C and the fruits get cooled to the storage temperature in 08 hours The latent heat of freezing is 105 kJ/kg and specific heat of fruit is 1.256 kJ/kg K. Find the refrigeration capacity of the planıThe bottom of a 50mm diameter, 2mm thick metallic induction heater is 120C while its thermal conductivity is 60 W/m-C. The voltage and current flowing into the heater are 220V and 5A, respectively. Find the temperature at the top portion of the pan.