An electric motor has an effective resistance of 29. 4 ω and an inductive reactance of 42. 6 ω. When working under load. the rms voltage across the alternating source is 442 v. The rms current will be 8.54 A
AC stands for “Alternating Current,” meaning voltage or current that changes polarity or direction, respectively, over time. AC electromechanical generators, known as alternators, are of simpler construction than DC electromechanical generators.
RMS or root mean square current/voltage of the alternating current/voltage represents the D.C current/voltage that dissipates the same amount of power as the average power dissipated by the alternating current/voltage. For sinusoidal oscillations, the RMS value equals peak value divided by the square root of 2.
I (RMS) = RMS voltage / 
= 442 / 
= 442 / 
= 442 / 
= 8.54 A
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Yes, acceleration only tells you how velocity is changing. It doesn't say anything about what velocity is at any given time.
For example, if you set your car to cruise control on the highway going 80 mph. That is a constant high velocity, yet the car has 0 acceleration.
The opposite is also true. After a red light turns green, you put foot on the gas to accelerate. However, your velocity is initially low even though it has high acceleration.
Answer:
Hydrogen and Oxygen i believe
Explanation:
Answer:
(a) 
(b) 
: From the air to the surroundings.
Explanation:
Hello,
(a) In this case, we can compute the area at the entrance by firstly computing the inlet volumetric flow:
Then, with the velocity, we compute the area:
(b) In this case, via the following energy balance for the nozzle:
We can easily compute the change in the enthalpy by using the given Cp and neglecting the work (no done work):
Finally, the heat turns out:
![Q=-348.795kW+\frac{1}{2}*2.3\frac{kg}{s}*[(460\frac{m}{s})^2 -(3\frac{m}{s})^2 ]\\\\Q=-348.795kW+243329.65W*\frac{1kW}{1000W}\\ \\Q=-105.5kW](https://tex.z-dn.net/?f=Q%3D-348.795kW%2B%5Cfrac%7B1%7D%7B2%7D%2A2.3%5Cfrac%7Bkg%7D%7Bs%7D%2A%5B%28460%5Cfrac%7Bm%7D%7Bs%7D%29%5E2%20%20%20-%283%5Cfrac%7Bm%7D%7Bs%7D%29%5E2%20%20%5D%5C%5C%5C%5CQ%3D-348.795kW%2B243329.65W%2A%5Cfrac%7B1kW%7D%7B1000W%7D%5C%5C%20%5C%5CQ%3D-105.5kW)
Such sign, means the heat is being transferred from the air to the surroundings.
Regards.
Answer: Euglena are photosynthetic
Explanation: USA test prep
