Fossil fuels when burned let out toxins and pollution in the air. Because of that scientists and engineers work together to find ways to not be so dependent on fossil fuels so we are not polluting our air.
Answer:
33.4KW
Explanation:
Firstly, we calculate the power index in a reversible heat engine which is given as;
n = 1 - T1/T2
T1 = atmospheric temperature 298k
T2 = reservoir temperature 1500k
n = 1 - 298/1500
n = 0.8013
output energy = n × energy input
0.8013×150000 = 120195KJ/hr
Power output = 120195KJ/hr/3600 = 33.4KW
Answer:
6.4 m/s
Explanation:
From the equation of continuity
A1V1=A2V2 where A1 and V1 are area and velocity of inlet respectively while A2 and V2 are the area and velocity of outlet respectively
where r1 and r2 are radius of inlet and outlet respectively
v1 is given as 1.6 m/s
Therefore
<h2>
Answer:</h2>
24Ω
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Explanation:</h2>
When resistors are connected in parallel, the reciprocal of their combined resistance, when read with a DMM (Digital Multimeter - for measuring various properties of a circuit or circuit element such as resistance...) is the sum of the reciprocals of their individual resistances.
For example if two resistors of resistances R₁ and R₂ are connected together in parallel, the reciprocal of their combined resistance Rₓ is given by;
= 
+ 
Solving for Rₓ gives;
= 
------------------(i)
From the question;
Let
R₁ = resistance of first resistor = 40Ω
R₂ = resistance of second resistor = 60Ω
Now,
To get their combined or total resistance, Rₓ, substitute these values into equation (i) as follows;
= 
= 
= 24 Ω
Therefore, the total resistance is 24Ω
Answer:
B. The thickness of the heated region near the plate is increasing.
Explanation:
First we know that, a boundary layer is the layer of fluid in the immediate vicinity of a bounding surface where the effects of viscosity are significant. The fluid is often slower due to the effects of viscosity. Advection i.e the transfer of heat by the flow of liquid becomes less since the flow is slower, thereby the local heat transfer coefficient decreases.
From law of conduction, we observe that heat transfer rate will decrease based on a smaller rate of temperature, the thickness therefore increases while the local heat transfer coefficient decreases with distance.
