Engineering, 08.09.2020 14:01, 19elbatawisaly

A stirrer of shaft power 500W is used to stir 100 kg of water that is being heated. The heater output power is 3.5 kW and heat losses are 800W. The initial temperature of the water is 20°C. Determine: (a) How long it will take before the water reaches a temperature of 80°C, (b) The internal energy change of the water. Neglect the specific heat capacity of the vessel itself and take the specific heat capacity of water to be 4.19 kJ/kgK.

Answers: 3

Show answers

Other questions on the subject: Engineering

Engineering, 04.07.2019 16:10, Arealbot

The force on a cutting tool are 2600n vertically downward and 2100 horizontal. determine the resultant force acting on the tool and the angle at which it acts.

Answers: 1

continue

Engineering, 04.07.2019 18:10, anna22684

Water at 70°f and streams enter the mixing chamber at the same mass flow rate, determine the temperature and the quality of the exiting stream. 0 psia is heated in a chamber by mixing it with saturated water vapor at 20 psia. if both streams enters the mixing chamber at the same mass flow rate, determine the temperature and the quality of the existing system.

Answers: 2

continue

Engineering, 04.07.2019 18:20, yasyyas646646

Agas mixture consists of 8 kmol of h2 and 2 kmol of n2. determine the mass of each gas and the apparent gas constant of the mixture.

Answers: 3

continue

Engineering, 04.07.2019 18:20, safiyabrowne7594

Ahe-xe mixture containing a 0.75 mole fraction of helium is used for cooling electronics in an avionics application. at a temperature of 300 k and atmospheric pressure, calculate the mass fraction of helium and the mass density, molar concentration and molecular weight of the mixture. if the cooling capacity is 10 l, what is the mass of the coolant?

Answers: 3

continue

Do you know the correct answer?

A stirrer of shaft power 500W is used to stir 100 kg of water that is being heated. The heater outpu...