125 W is the power output of this machine.
Answer:
Explanation:
Power is defined as the amount of work done on the system to move that system from its original state within the given time interval. So it can be determined by the ratio of work done with time interval. As work done is the measure of force required to move a system to a certain distance. Work done is calculated as product of force with displacement.
So in the present case, the force is given as 100 N, the displacement is given as 5 m and the time is given as 4 s, then power is
![Power = \frac{Work done}{Time}](https://tex.z-dn.net/?f=Power%20%3D%20%5Cfrac%7BWork%20done%7D%7BTime%7D)
As Work done = Force acting on the machine × Displacement
So ![Power = \frac{(Force * Displacement)}{Time}](https://tex.z-dn.net/?f=Power%20%3D%20%5Cfrac%7B%28Force%20%2A%20Displacement%29%7D%7BTime%7D)
Power =
=125 W
So, 125 W is the power output of this machine.
Answer:
-2
Explanation:
Since its a compound, it's charge is 0.
So, there are 2 Fe and 3 Oxygen,
let x = oxidation number of oxygen
2(+3) + 3x =0
x =-2
Side note : even if the oxidation number is positive, make sure to put the positive sign like how you would in numbers
Answer:350.92 KJ/kg
Explanation:
Given the process is reversible adiabatic i.e it is isentropic
![P_1=5 MPa](https://tex.z-dn.net/?f=P_1%3D5%20MPa%20)
![T_1=4500 MPa](https://tex.z-dn.net/?f=T_1%3D4500%20MPa)
![P_2=1.4 MPa](https://tex.z-dn.net/?f=P_2%3D1.4%20MPa)
From steam table
![h_1=3317.03KJ/kg](https://tex.z-dn.net/?f=h_1%3D3317.03KJ%2Fkg)
For isentropic process ![s_1=s_2](https://tex.z-dn.net/?f=s_1%3Ds_2)
at ![P_2=1.4 MPa](https://tex.z-dn.net/?f=P_2%3D1.4%20MPa)
![s_2=6.82 KJ/kg-k](https://tex.z-dn.net/?f=s_2%3D6.82%20KJ%2Fkg-k)
![h_2=2966.11 KJ/kg](https://tex.z-dn.net/?f=h_2%3D2966.11%20KJ%2Fkg)
Therefore Work output of the turbine per unit mass of steam is =![h_1-h_2](https://tex.z-dn.net/?f=h_1-h_2)
=3317.03-2966.11
=350.92 KJ/kg
The relationship between gas pressure and gas volume is described by ________.
A) Boyle's law
B) Henry's law
C) Dalton's law
D) Charles' law
Answer:
<u><em>A) Boyle's law</em></u>
The freezing point of the water is 0 C , and it equals to 273 K
Then, To convert from Kelvins degrees to Celsius degrees we use the relation
![K = C + 273](https://tex.z-dn.net/?f=K%20%3D%20C%20%2B%20273)
Also,
![C = K - 273](https://tex.z-dn.net/?f=C%20%3D%20K%20-%20273)