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Miss Y agreed to keep a request from her friend to cook rice in an aluminium pot.A metal cover was used on the top of the aluminium pot during cooking,but after a short-while the metal cover was fallen down.They involved in a debate to explain it using a theorem of physics why the metal cover has been fallen down from the top of the aluminum pot.Miss Y said that it was due to be produced pressure but her friend agreed on it to some extent and also asked about the conversion of energy, demanding to show the expression for the theorem.Could you please help Miss Y?
A steady flow, steady state thermodynamic system receives 45 kg/min of a fluid at 207kPa and discharges it from point 24 m. above the entrance section at 1034 kPa. The fluid enters with a velocity of 36.6 m/s and leaves with a velocity of 12 m/s. During this process, there are supplied 7 kW of heat from an external source, and the increase in enthalpy is 4.6 kJ/kg.
An indoor heater operating on the Carnot cycle is warming the house up at a rate of 30 kJ/s to maintain the indoor temperature at 72 ºF. What is the power operating the heater if the outdoor temperature is 30 ºF?
Two objects attract each other with a gravitational force of magnitude 1.00 10-8 N when separated by 19.3 cm. If the total mass of the objects is 5.05 kg, what is the mass of each?
3. A refrigerator operating on standard vapour compression cycle has a coefficiency performance of 6.5 and is driven by a 50 kW compressor. The enthalpies of saturated
liquid and saturated vapour refrigerant at the operating condensing temperature of 35°C are
62.55 kJ/kg and 201.45 kJ/kg respectively. The saturated refrigerant vapour leaving evaporator
has an enthalpy of 187.53 kJ/kg. Find the refrigerant temperature at compressor discharge. The
cp of refrigerant vapour may be taken to be 0.6155 kJ/kg°C
