Numerade

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(1) [5 points] What is the improvement brought by the fourth generation of CT scanners, compared to the third generation? What are its shortcomings. (2) [10 points] Calculate the Radon transform of $I(x, y) = sinc(x) sinc(y)$ at angle $\theta = \pi/4$. Hint: Use the Fourier slice theorem to show that the Fourier transform of $R_{\pi/4}(l)$ is $rect(\frac{\omega}{2\pi\sqrt{2}})$. (3) [5 points] The CT scanner measurements are corrupted by an additive unknown constant (different for every projection angle). Explain why the usual image reconstruction algorithm still can successfully deal with this artifact.

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A simply supported beam is 8m long and has a roller support at A. A 40kN point load is applied at an angle of 60 degrees to the top face of the beam, 3m from A. 5m from support A is a further 20kN point load acting vertically downward on the beam. Draw the beam under the loading arrangement suggested and calculate the support reactions. ($V_A$ = 25.5 kN, $V_B$ = 29.11kN.)

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This step is when organic matter and microorganisms are treated with additives that promote the formation of larger organic matter+microorganisms particles: Question 1Answer a. Coagulation b. Chlorination c. Filtration d. Sedimentation

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Please choose all correct answers below. Please select all processes that cells use to move food/proteins and water in and out of the cell. Endocytosis Exocytosis Phagocytosis Oxocytosis Merocytosis

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io(t) iD(t) + + ic(t) D Vo(t) R C - - iL(t) + L + Vg(t) - is(t) S

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A limit order instructs the stockbroker to buy or sell at a specific price. True False

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Instructions Fill in the amounts that are missing. E8.6 (LO2) (Purchases Recorded Net) Presented below are transactions related to Guillen Ltd. May 10 Purchased goods billed at £20,000 subject to cash discount terms of 2/10, n/60. 11 Purchased goods billed at £15,000 subject to terms of 1/15, n/30. 19 Paid invoice of May 10. 24 Purchased goods billed at £11,500 subject to cash discount terms of 2/10, n/30. Instructions a. Prepare general journal entries for the transactions above under the assumption that purchases are to be recorded at net amounts after cash discounts and that discounts lost are to be treated as financial expense. b. Assuming no purchase or payment transactions other than those given above, prepare the adjusting entry required on May 31 if financial statements are to be prepared as of that date.

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a) For NACA 4412 airfoil (use Xfoil)(http://web.mit.edu/drela/Public/web/xfoil/) (use this software to see lift and drag characteristics at different angle of attack and Reynolds numbers) b) with chord of 1.5 m at an angle of attack of 4°. For a free-stream velocity of 30 m/s at standard sea-level conditions, calculate the lift and drag per unit span. Note: The viscosity coefficient at standard sea-level conditions is $1.7894 \times 10^{-5} kg/(m \cdot s)$. calculate the lift-to-drag ratio. c) Consider a finite wing of aspect ratio 4 the angle of attack is 5°. Calculate (a) the lift coefficeint at low speeds (incompressible flow)

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I got this question on my Thermo homework and I'm not sure how to answer it. "A rigid container has a volume of 1 m^3. If a perfect vacuum is maintained by the container, what is the Exergy of the Vacuum? Does the Vacuum have an Exergy?" My teacher's hint was: Did it take work to create the vacuum? With this in mind, I assume that the vacuum has an exergy value, I am just not sure how to calculate what that value is without more information.

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Describe the physical principles of refraction and three refraction abnormalities, including their correction. Draw and label.

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