Answer:the fractional conversion of methane is 12.5%
Explanation:The reaction represent the combustion of methane to produce Co2 and steam.
CH4 +2O2_CO2 + 2H2O
From gay lussac law of proportionality
1mol of CH4 requires 2mol of Oxygen to produce 1 mol of CO2 and 2mol of H2O
So from the combining ratio,25% of O2 will fractional produce 25×1/2% of CH4.
While 12.5% of CO2 and 25% of steam is also produced .so in essence 2.5% of CO2 was lost in the reaction.
Answer:
A supercharger is an air compressor that increases the pressure or density of air supplied to an internal combustion engine. This gives each intake cycle of the engine more oxygen, letting it burn more fuel and do more work, thus increasing power.
Explanation:
Answer:
The thrust of the engine calculated using the cold air is 34227.35 N
Explanation:
For the turbofan engine, firstly the overall mass flow rate is considered. The mass flow rate is given as
Here
- ρ is the density which is given as
- P is the pressure of air at 5500 m from the ISA whose value is 50506.80 Pa
- R is the gas constant whose value is 286.9 J/kg.K
- T is the temperature of the inlet which is given as 253 K
- A is the cross-sectional area of the inlet which is given by using the diameter of 2.0 m
- V_a is the velocity of the aircraft which is given as 250 m/s
So the equation becomes
Now in order to find the flow from the fan, the Bypass ratio is used.
Here BPR is given as 8 so the equation becomes
Now the exit velocity is calculated using the total energy balance which is given as below:
Here
- h_4 and h_5 are the enthalpies at point 4 and 5 which could be rewritten as and respectively.
- The value of T_4 is the inlet temperature which is 253 K
- The value of T_5 is the outlet temperature which is 233K
- The value of c_p is constant which is 1005 J/kgK
- V_a is the inlet velocity which is 250 m/s
- V_e is the outlet velocity that is to be calculated.
So the equation becomes
Rearranging the equation gives
Now using the cold air approach, the thrust is given as follows
So the thrust of the engine calculated using the cold air is 34227.35 N
Answer:
The relationship between atomic structure and Youngs modulus could be defined as the stiffness of a material.
Explanation:
Young modulus is a constant that shows how a material can be deformed under a stress applied on certain material and also shows its stiffness, this deformation will change or not its atomic structure depending on the capability of material to recover from the stress applied. The stiffness of a material is directly proportional to Young's modulus, as well as its atomic structure, if a material has high stiffness, it won't bend so easily and it won't change its atomic structure easily.
Answer:
rB / rA = 3
Explanation:
The resistance of any conductor, can be expressed by the following equation:
where:
ρ = resistivity of the material
A = area through which the current is flowing
L = length of the object
If we are talking about wires, usually we approximate them as cylindrical objects, where A is the circular cross-section of the wire.
So, we can write the value of the resistance, as follows:
If we know that wire B is to have nine times the resistance of wire B, we can establish the following proportion between them:
Taking square roots on both sides, we finally get: