Answer:
r = 5.5 ohms
Explanation:
Given:-
- The open circuit voltage, Vo = 3.5 V
- The terminal voltage, Vt = 2.8 V
- The load, R = 22 ohms
- The internal resistance = r
Find:-
What is the generator’s output impedance (pure resistance)?
Solution:-
- We see that the source Voltage (Vo) is not entirely used for the attached load. Some of the source voltage is dropped within due to the source internal resistance or impedance.
- The terminal voltage (Vt) is the amount of Voltage drop across the load. The current drawn by the load I can be determined by Ohm's Law:
Vt = I*R
I = Vt / R
I = 2.8 / 22
I = 0.12727 Amps
- Since, the attached load (R) and the pure impedance (r) of the source are in series. The current ( I ) is constant across both. The potential drop across the pure resistance (r) can be determined from Ohm's law:
Vo - Vt = I*r
r = ( Vo - Vt ) / I
r = ( 3.5 - 2.8 ) / 0.12727
r = 5.5 ohms
Solution :
Given :
The power of the air‐conditioning (AC) unit is , W = 0.434 kW
The coefficient of performance or the COP of the air‐conditioning (AC) unit is given by = 6.22
Therefore he heat removed is given by , 
Now if the electricity is valued at 0.10 dollar per kW hour, then the operating cost of the air conditioning unit in 24 hours is given by = 0.10 x 2.7 x 24
= 6.48
Therefore the operating cost = $ 6.48 for 24 hours.
Answer:
A.) 0.08 kJ/kg.K
B.) 207.8 KJ/Kg
C.) 0.808
Explanation:
From the question, the use of fluids mechanic table will be required. In order to get the compressor processes, the kinetic energy and the potential energy will be negligible while applying the ideal gas model.
Since the steam is a closed system, the carbon dioxide will be compressed adiabatically.
Please find the attached files for the solution and the remaining explanation.
Primary batteries
Secondary batteries
Answer:
The answer is A.
Explanation:
Two main types of network switches, modular and fixed configuration switches, are used for connecting the devices with one another provided they are on the same network.
As the name suggests, modular switches can be configured according to your needs and specific situations where you need a different setup.
The one advantage fixed-configuration switches have over the modular switches is that they are easier to operate. You can't change anything for a different application but they are simpler to setup and use, you can just plug them in and start using. They are usually for the more casual end-user and home networks etc.
I hope this answer helps.
