A 500MVA, 220kV/24kV, three phase Y-Δ transformer has an equivalent series impedance of 1 + j5 Ω per phase referred to the high-voltage side. The transformer is supplying a three phase load of 500MVA, 0.85 power factor lagging at a terminal voltage of 24 kV (line to line) on its low-voltage side. The primary is supplied from a feeder with an impedance of 0.5+ j1 Ω per phase. Determine the line-neutral voltage in kV across the load when it is referred to the transformer high side voltage.

An engine, weighing 3000 n, is supported on a pedestal mount. it has been observed that the engine induces vibration into the surrounding area through its pedestal at the maximum operating speed. determine the stiffness of the dynamic vibration absorber spring in (n/m) that will reduce the vibration when mounted on the pedestal. the magnitude of the exciting force is 250 n, and the amplitude of motion of the auxiliary mass is to be limited to 2 mm note: in this question type-in right numbers, no decimals, no fractions, no unit. approximate to right number if needed