A 2 kW kettle contains 2 kg of water at 10°C.
It is switched on for 420 seconds, and the
tempe...
Physics, 20.06.2020 17:57 sweetcandy16gaming
A 2 kW kettle contains 2 kg of water at 10°C.
It is switched on for 420 seconds, and the
temperature rises to 100°C.
a) How much electrical energy is supplied?
b) How much energy was given to the water?
c) Why are these 2 answers not the same?
d) What percentage of the energy supplied wen
to the water?
e) How could this percentage (the efficiency)
be increased?
Answers: 1
Another question on Physics
Physics, 22.06.2019 10:30
In automobile steering wheel is shown what is the ideal mechanical advantage blank? if the ama is eight what is the efficiency of the steering wheel?
Answers: 1
Physics, 22.06.2019 14:00
Una carga puntual de 3 x 10-6 c se coloca a 12 cm de una segunda carga puntual de - 1,5 x 10-6 c. calcular la magnitud fuerza eléctrica entre las cargas
Answers: 2
Physics, 22.06.2019 20:30
Ascientist notices that an oil slick floating on water when viewed from above has many different colors reflecting off the surface, making it look rainbow-like (an effect known as iridescence). she aims a spectrometer at a particular spot and measures the wavelength to be 750 nm (in air). the index of refraction of water is 1.3
Answers: 1
You know the right answer?
Questions
Mathematics, 23.03.2020 18:32
Mathematics, 23.03.2020 18:32
Mathematics, 23.03.2020 18:33
Computers and Technology, 23.03.2020 18:33
Mathematics, 23.03.2020 18:33
