Numerade

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Given are iid with a normal distribution and represent the times necessary to perform three successive repair tasks with expected values 65 and variances 20. What is the value of Var()? Question 12 options: 20 40 0 130

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17. The decomposition of \( \mathrm{SO}_{2} \mathrm{Cl}_{2} \) is a first-order reaction: \[ \mathrm{SO}_{2} \mathrm{Cl}_{2}(\mathrm{~g}) \rightarrow \mathrm{SO}_{2}(\mathrm{~g})+\mathrm{Cl}_{2}(\mathrm{~g}) \] The rate-constant for the reaction is, \( 2.8 \times 10^{-3} \mathrm{~min}^{-1} \) at 800 K . If the initial concentration of \( \mathrm{SO}_{2} \mathrm{Cl}_{2} \) is \( 1.24 \times 10^{-3} \mathrm{~mol} / \mathrm{L} \), how long will it take for the conce tration to drop to \( 0.31 \times 10^{-3} \mathrm{~mol} / \mathrm{L} \) ? \( 5.0 \times 10^{2} \mathrm{mir} \)

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Which of the following samples represent dependent sample from a statistical view? Samples A, B, and C for a study have all subjects (persons) different. Samples A, B, and C for a study have a few subjects (persons) different. Samples A, B, and C for a study have a few subjects (persons) same. Samples A, B, and C for a study have all subjects (persons) same.

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In the long run, imports are paid for by exports because A. all Canadian dollars ultimately must be held in Canada. B. the regulations of the World Bank stipulate that this is how international accounts must be settled. C. for the most part, foreigners want Canadian-produced goods in exchange for the goods that are shipped to Canada. D. All of the above.

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Question 3 (1 point) You scrape your skin and start bleeding, you can conclude that your injury has reached at least the _______________. ? stratum spinosum ? dermal papillae ? stratum lucidum ? subdermis

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A weight hooked onto the end of a spring fixed to a ceiling bounces up and down. The weight’s height, h, relative to the ground, in meters, is given by the formula h = 0.25 sin(240t – 90) + 1.5, where t is the time, in seconds.

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Question: 10 A programmer wants to move the element element across the webpage. They come up with this script: <script> var distance = 0; var STOPPING_DISTANCE = 100; //Line 3 //Line 4 function move() { //Line 7 distance += 5; element.setAttribute("style", "left: " + distance + "px"); checkDistance(); } function checkDistance() { //Line 14 if(distance == STOPPING_DISTANCE) { //Line 17 } } </script> Where should var time = setInterval(move, 100) and clearInterval(timer) be placed in this code segment in order to get it to work correctly? setInterval on Line 3 clearInterval on Line 4 setInterval on Line 3 clearInterval on Line 14

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1. Four electric charges are arranged in the following way: a -1 nC charge located at (0.25 m, 0.25 m), a 2 nC charge located at (-0.5 m, 0.5 m), a -2 nC charge located at (0 m, 0.25 m), and a 1 nC charge located at (0.25 m, 0 m). a. What is the electric field located at the origin? b. If an electron were placed at the origin, what would be the force acting on the electron by the four charges? c. What would be the acceleration of the electron?

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Find the two's complement for the signed integer 2 in a 3-bit machine.

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A child is pushing multiple toy cars with the given value: time variable cm car 1 position car 1 velocity car 2 position car 2 velocity car 3 position car 3 velocity variable units variable cm variable units variable cm variable units variable 1 0 0 ? 0 ? 0 ? 2 2 2.5 ? 2.5 ? 2 ? 3 4 11 ? 10 ? 7 ? 4 6 23 ? 23 ? 16 ? 5 .8 38 ? 40 ? 28 ? 6 1.0 58 ? 62.5 ? 42 ? 7 1.2 81 ? 89 ? 60 ? 8 1.4 81 ? time variable cm car 4 position car 4 velocity car 5 car 5 velocity variable units variable cm variable units variable 1 0 0 ? 0 ? 2 2 3 ? 3 ? 3 .4 11 ? 10 ? 4 6 24 ? 23 ? 5 .8 41.5 ? 39 ? 6 1.0 64 ? 59.5 ? 7 1.2 90 ? 88 ? 8 1.4

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