Numerade

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Classify each of the following as covalent, ionic, metallic or molecular zinc, sucrose, sodium iodide, diamond A metallic, molecular, ionic and covalent B metallic, covalent, ionic and molecular C metallic, ionic, molecular, covalent D ionic, metallic, covalent and molecular

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A. Charge the rod used in section I by rubbing it with wool or some other material. Obtain a small pith ball attached to an insulating thread. Touch the ball to the charged rod and observe the behaviour of the ball after it touches the rod. Is the ball charged after it touches the rod?

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Translate to a proportion: What percent of 52 is 39 ? Let p = percent.

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Question 8 What is the main function of the collecting ducts? Reabsorption of large proteins and ions. Filtration of large proteins and red blood cells. Reabsorption of water under hormoral control. Secretion of ions. Secretion of water through aquaporins. Release of anti-diuretic hormone (ADH). 1 pts

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Find the x-value of the vertex of the parabola: f(x) = x^2 + 5x + 8 x = \frac{-5}{2} x = 8 x = -4 x = -5

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By the year 2000, more than half of all calorie consumption in the United States was from

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YEAR III SEMESTER II CAT FOR BSC EEE EES 312: COMMUNICATION SYSTEMS (a) The binary sequence 11100101 is applied to a DPSK system. The bit duration is 1uS. The carrier frequency is 6MHz. iii)) Calculate the transmission bandwidth of the system. (2 Marks) iv)) Plot the waveform of the transmitted signal. (6 Marks) (b) FSK transmission is used to transmit 1200b/s digital signals over a telephone channel. The FSK signals are fit into the range 500 to 2900Hz. The carrier frequencies are taken to be 1200Hz and 2200Hz. a. Calculate the required modulation index (3 Marks) b. Calculate the required roll-off factor (3 Marks) c. Sketch the spectrum of the baseband signal (3 Marks) d. Sketch the spectrum of the transmission channel (positive frequencies only) (3 Marks)

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2. (5 pts) For the following circuit (IDss~ 10 mA, VGS, OFF~-3.4V for 2N5486), a) Determine ID and VGS at the Q point. b) Determine the gain or $V_{out}/V_{in}$

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19. Which of the following residential appliances will require a special-purpose branch circuit? A. Microwave oven B. Coffeemaker C. Electric range D. Clothes iron

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2) Find the solution of the following differential equations with given conditions i) $y'' + 5y' + 6y = 0$ ii) $\frac{d^2y}{dx^2} + 6\frac{dy}{dx} + 9y = 0$; $y(0) = 2$, $\frac{dy}{dx}(0) = 0$ iii) $y'' + 2y' + 5y = 0$ iv) $x^2\frac{d^3y}{dx^3} - 2\frac{dy}{dx} = 0$; $y(1) = 2$, $\frac{dy}{dx}(1) = \frac{d^2y}{dx^2}(1) = 0$

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paul j.