Answer:
The three ways thermal energy is transferred are;
1) Conduction
2) Convection
3) Radiation
Explanation:
1) The conduction of the heat from the open flame to the marshmallow is through the direct contact of the flame with the marshmallow, such that the flame the region of the combustion reaction, that produces light and heat touches the marshmallow
2) The convection process is the transfer of heat from the rising heated combustion products, as well as the heated air that rises from the flame
3) The radiation heat transfer is the transfer of the heat from the fire to the marshmallows directly by the heat the moves in the form of electromagnetic waves at temperatures above 1000 K, without the need for a medium, such that the marshmallow can be heated by the heat coming from side of the flame.
Answer:
efficiency of solar panel is 18%
Explanation:
Energy received by the sunlight is given as
here we know the dimensions of the plate as
now we have
now the power received by the sun light is given as
now the output power due to solar panel is given as
now the efficiency is given as
Yes you are right cuz charging by friction cant be done in fluids( liquid and gas)
