Answer: It is a term of heat transfer process in which fins are surface that are the extension of the object to work for the heat exchangers to increase the heat exchanging rate.
Explanation: Fins are considered to help the heat exchanger surface to lead the process of heat transfer by increasing the are of the surface which is exposed to the surroundings. Fins work really well with materials having high thermal conductivity and will be more effective. They are preferred because they increase the rate of exchange of heat by increment in the convection.
Answer:
Frequency =
Wavenumber =
Energy =
Energy = 1.4579 eV
Energy =
Explanation:
As we are given the wavelength = 850 nm
conversion used :
So, wavelength is
The relation between frequency and wavelength is shown below as:
Where, c is the speed of light having value =
So, Frequency is:
Wavenumber is the reciprocal of wavelength.
So,
Also,
where, h is Plank's constant having value as
So,
Also,
So,
Also,
So,
Answer:
when 5% excess air is supplied, moles of air supplied/moles of fuel =
Explanation:
Equivalence ratio = 0.6
Equivalence ratio = Actual air to fuel ratio (AAFR)/ stoichiometric air to fuel ratio SAFR
combustion reaction of propane is
From above reaction, 1 mole of propane, from the reaction, 5 moles of oxygen required,
we know that air contains 21% O_2 and 79% N_2,
Therefore, moles of air based on stoichiometry
Theoretical air to fuel ratio
Given
Actual Air Fuel Ratio
when 5% excess air is supplied, moles of air supplied/moles of fuel =