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Another way to understand why kVA is different to kW, is the Power triangle. Figure 1: power Triangle (source: Electrical technology) The power triangle shows that the total (apparent) power is the vector sum of the active (or real) power and the reactive power. Active Power $P$: this is the actual power that its used/is available (electrical engineers ...

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Sorry, but these are great educational devices. Adafruit.com sells GPS receiver boards, ~30-USD. These can talk to small SBC (single board computers) such as Gemma M0, 10-USD, Trinket M0, 9-USD, and many others, even arduino.cc devices. Lots to choose from and highly versatile. Even Raspberry Pi. Search the first listed site for GPS, then Gemma M0, and then ...

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Be careful: "efficiency" usually means the ratio of energy applied to energy removed from the "cold side" object. Since a Peltier junction has a fixed delta-T , you won't get any colder by increasing the heat-sink capability. You will get to the cold limit faster, or even get to a lower temperature if you use cold water instead of room-...

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I have been in engineering management and planning capacities several times in my career. The purpose of planning is to match what you want to achieve with the resources it's going to take to get it done. I've seen many examples where failure to adequately consider resources caused projects to fail. Which results in a lot of discouragement for both the ...

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Assuming that the gear box is on the left end of the shaft (i.e. no flexible shaft between motor and gearbox). The angular velocity on the left end of the gear box is $\omega_1$. The angular velocity of the shaft side of the gear box is assumed as $\omega_1' = \frac{\omega_1}{N}$. The angular velocity on the right end of the shaft is $\omega_2$. So the ...

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