Numerade

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Use the basic hydrostatic pressure equation to show that the mass of an air column of unit surface area (1 m2) and very large height (say h = 100 km) is p0 /g where V is the atmospheric pressure at sea level and g is the acceleration due to gravity (g = 9.8 ms−2 ). Thus, estimate (a) the total mass of the Earth's atmosphere, assuming the global mean pressure at the surface of the Earth is PS = 984 hPa due to the variations in elevation of the land (radius of earth R = 6400 km), and (b) the total number of moles of air in the atmosphere.

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In anatomy and physiology is the following an accurate comparison of T cells and B cells: T cells develop and mature in the thymus, whereas B cells develop and mature in the bloodstream.

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Consider the idea of mass shootings i want you to take information from this course and answer the following question. Is there a link between mental illness and mass shootings? if so what evidence have you learned throughout the course of the semester to support this idea? if not why do you feel mass shootings occur and argue how this idea is supported by topics addressed in this course?

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Which character(s) has a shared, ancestral state (symplesiomorphy) for the clade that includes frog, but not bass?

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8- Find the fatigue stress concentration factor at section B in the Figure below (Use Sut = 1000MPa) A- 1.10 B- 1.54 C- 1.80 D- 2.55 E- None of them

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11. Suppose we gather the following information on students taking 4630 Percentage of Classes Attended (X] Result (Y) [0-30%[31-60%61-80%81-100% Passed 4630|0.02 0.10 0.20 0.30 Failed 4630 |0.08 0.15 0.10 0.05 Let X = 1 if student attended between 0 and 30% of the lectures for that semester X = 2 if student attended between 31 and 60% of the lectures for that semester X=3 if student attended between 61 and 80% of the lectures for that semester X = 4 if student attended between 81 and 100% of the lectures for that semester and Let Y = 1 if student passed ECON 4630 Y=2 if student failed ECON 4630 a. (6 points) What is the probability of passing 4630 and attending 31-60% of the lectures? b. (6 points) What is the probability of passing 4630 or attending 61-80% of the lectures? c. (6 points) Given that a person attends 61-80% of the lectures, what is the probability of failing? d.6 points Are passing and attendance independent? Prove this mathematically

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Texts: 1) Create a module that accepts an input N and creates a ring of N 1x1x1 cubes, 10 cm from the origin, rotated so these cubes are separated by 360/N degrees. Using OpenSCAD.

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Question 3 An open tank car travels to the right at a uniform velocity of 4.5 m/s as shown in Figure 3. At the instant shown the car passes under a jet of water issuing from a 0.2 m diameter pipe, moving to the left at 5 m/s. The velocity of the water jet is 23 m/s. Choose an appropriate control volume and a coordinate system moving to the right at 3 m/s to determine the force exerted on the tank by water. Note the given xy coordinate system, i.e. x is positive towards the right and y is positive upwards. (15 marks)

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2- Find the trial solution of the following equation. Don't solve for constants. $D^2(D^2 - 2D + 5)y = xe^x + e^x cos2x + x + 1$

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2. (3 points) Generate a 3ms time delay using timer1 in mode 1. Assume that XTAL = 16 MHz.

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olga r.