A single-phase 100 kVA, 2400/240 V, 60 Hz step-down transformer is connected to a load on the secondary side. The load absorbs 59 KVA at 0.9 PF lagging and its voltage is 238 V. The transformer equivalent circuit is below with Req = 1.6 and Xeq = 2.4. Req+jxeq Ω + V₁ Load Determine the magnitude at the transformer primary side voltage, V₁, in V. Round it up to one decimal place.

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1-What phrase is used when a substitution is permitted for a specific item? 2-The specifications state that all work shall be done... 3-What phrase is used when a substitution is permitted for a specific item? 4-What is the purpose of an electrical symbol? 5. Where are notations found?

Explain and draw a 7490 chip in a circuit of your own design. I want the actual chips drawn with the symbols inside, then a wiring diagram showing the interconnections. Power source and A, B, C, and/or D inputs may be added in the form of either buttons or switches.