Numerade

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For a power transformer operating at full load it draws voltage and current equal to 250 V and 100 A respectively at 0.9 pf. Iron and copper losses are equal to 120 kW and 300kW. What is efficiency?a.96.44%b.86.44%c.99.12%d.Non of the mentioned

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Lombroso's The Female Offender (1893) remained one of the few studies of female criminality until the ? 1970s ? 1990s ? 2010s ? 1950s

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XML is not an example of a character set standard. t/f

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15. Calculate the missing angles (don't measure). a. Find angle a b. find angle b $a^\circ$ $105^\circ$ $50^\circ$ $35^\circ$ $42^\circ$ $b^\circ$

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The following systems of equations all have unique solutions. Solve these systems using the method of Gauss-Jordan elimination with matrices. (a) $x_1 - 2x_2 = -6$ $2x_1 - 3x_2 = -8$ $(x_1, x_2) = (b) $2x_1 + 2x_2 = 6$ $3x_1 + 2x_2 = 5$ $(x_1, x_2) = (c) $x_1 + x_3 = 3$ $2x_2 - 2x_3 = -2$ $x_2 - 2x_3 = 6$ $(x_1, x_2, x_3) = (d) $x_1 + x_2 + 3x_3 = 11$ $x_1 + 2x_2 + 4x_3 = 16$ $2x_1 + x_2 + 6x_3 = 21$ $(x_1, x_2, x_3) = (e) $x_1 - x_2 + 3x_3 = 5$ $2x_1 - x_2 + 2x_3 = 3$ $3x_1 + x_2 - 2x_3 = 2$ $(x_1, x_2, x_3) = (f) $-x_1 + x_2 - x_3 = -3$ $3x_1 + x_2 + x_3 = 13$ $4x_1 + 2x_2 + 3x_3 = 18$ $(x_1, x_2, x_3) =

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Identify whether each species functions as a Brønsted-Lowry acid or a Brønsted-Lowry base in this net ionic equation. CN$^- $+$ HCO$_3$^- $ ?$ HCN (aq) $+ CO$_3$$^{2-} Brønsted-Lowry Brønsted-Lowry Brønsted-Lowry Brønsted-Lowry acid base In this reaction: The formula for the conjugate of CN$^-$ is The formula for the conjugate of HCO$_3^-$ is Submit Answer Retry Entire Group 8 more group attempts remaining

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x+14=170 10x+15y=170

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1. Consider a dispersive material whose (real) refractive index $n = n(\lambda)$ depends on the wavelength. Starting from the general definition of the group velocity: $v_g = \frac{\partial \omega}{\partial k}$ derive the alternative expression: $v_g = v_p \left[ 1 + \frac{\lambda}{n} \left( \frac{dn}{d\lambda} \right) \right]$ where we denoted the phase velocity by $v_p$.

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Challenge 4 -- Recursive Array Sum Write a function that accepts two arguments, an array of integers, and a number indicating the number of elements in the array. The function should recursively calculate the sum of all the numbers in the array. Demonstrate the use of the function in a program that asks the user to enter an array of numbers and prints its sum. c++

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A car travels 40.0 km due north and then 20.0 km [N 30.0 W]. Determine the magnitude and direction of the car's resultant displacement.

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