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bruce rollins

bruce r.

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Problem 5: Let P(m, n) be "n is greater than or equal to m" where the domain (universe of discourse) is the set of nonnegative integers. What are the truth values of In Vm P(m, n) and Vm Эn P(m, n)?

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Consider a projectile which is launched over flat ground, with an initial launch speed of vo = (33.8+/-2.7)kmh and an initial launch angle of theta= 46.5+/-2.6 . Use an experimental value of g=9.80+/-0.03 / for the gravitational acceleration. Determine how far from the launch point the projectile lands, and enter the value in units of . Hint: Use two-dimensional kinematic equations for projectile motion to determine the horizontal displacement when the vertical displacement is zero.

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A good or service with a horizontal supply curve is a good with... a. unit-elastic supply. b. perfectly elastic supply. c. perfectly inelastic supply. d. varying elasticity of supply. e. no elasticity.

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What major characteristic specifically defines a mastigote Euglenozoan? The presence of a flagellum The haustorium to attach to hosts without detection The development of chloroplasts to augment parasitism The presence of cystocarps

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Two particles with masses m are placed at the (0, a) and (0, -a) points on y-axis. Find the magnitude of gravitational acceleration (g) at the point P(x,0) on x-axis. \begin{enumerate} \item $\frac{4Gmx}{(x^2+a^2)^{1/2}}$ \item 0 \item $\frac{2Gmx}{(x^2+a^2)^{3/2}}$ \item $\frac{4Gmx}{(x^2+a^2)^{3/2}}$ \item $\frac{2Gmx}{(x^2+a^2)^{1/2}}$ \end{enumerate}

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1. Ammonia (NH$_3$) and hydrogen sulfide (H$_2$S) must both be ststripped from wastewater in a packed tower before the waste- water can be treated for reuse. Individual mass-transfer coef- ficients for ammonia transfer within a packed tower are $k_G = 3.20 \times 10^{-9} \text{ kgmole/m}^2 \cdot \text{s} \cdot \text{Pa}$ for the gas film, and $k_L =$ $1.73 \times 10^{-9} \text{ m/s}$ for the liquid film. At the temperature and concentration ranges of the solutes within the process, the equilibrium distribution data for the solutes NH$_3$ and H$_2$S are in the linear range. The Henry's law constants are $1.36 \times$ $10^3 \text{ m}^3 \cdot \text{Pa/kgmole}$ for NH$_3$, and $8.81 \times 10^5 \text{ m}^3 \cdot \text{Pa/kgmole}$ for H$_2$S. Under the assumption that both $k_G$ and $k_L$ for H$_2$S transfer is the same as those for NH$_3$ transfer, estimate and compare the overall mass-transfer coefficients $K_G$ and $K_L$ for H$_2$S and NH$_3$, respectively.

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A stationary shaft is modeled as a second-order system: mx + kx = h(t) (5) where m and k are the mass and stiffness of the shaft, respectively. Also, h(t) is the external excitation driving the shaft. Answer the following questions. (a) If m is 1 kg and the natural frequency of the shaft is 10 rad/s, what is the stiffness k of the shaft? (b) An engineer mounts the shaft onto a set of bearings to form a spindle. The vibration of the spindle is then modeled through: mi + ci + (k + k)x = h(t) (6) where ci and ki are the damping and stiffness of the bearings. If the bearings are ball bearings, ki = 800 N/m and ci = 3 Ns/m. Calculate the natural frequency wn and viscous damping factor of the spindle. Is the system overdamped or underdamped? (c) If the bearings are fluid bearings, ki = 20 N/m and ci = 33 Ns/m. Calculate the natural frequency wn and viscous damping factor of the spindle. Is the system overdamped or underdamped? (d) If the spindle is subjected to an impulsive load with zero initial conditions, which bearing should you use in order to minimize the vibration x(t)? Please explain why.

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Select ALL statement(s) that correctly explain Hume-Rothery rules. Electronegativity factor: The more electropositive one element and the more electronagative the other, the greater the likelihood that they will form an intermetallic compound instead of a substitutional solid solution. Atomic size factor: Appreciable quantities of a solute may be accommodated in this type of solid solution only when the difference in atomic radii between the two atom types is less than about 85%. Otherwise, the solute atoms create substantial lattice distortions and a new phase forms. Crystal structure: For appreciable solid solubility, the crystal structures for metals of both atom types must be different from each other. Valences: Other factors being equal, a metal has more of a tendency to dissolve another metal of higher valency than to dissolve one of a lower valency.

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5. Using a Truth Table, discover what Boolean function F = f(A,B) is implemented with the circuit below. To find F, use a Truth Table with inputs A and B, intermediate outputs C, D, and E, and final output F. Filling in function values for C, D, and E, will make finding F easier. What is the common name for function F?

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Question 5 Consider the situation pictured below, where a large boat rests in a body of water. The pressure at point A [Select] the pressure at point B. equal to greater than less than 4 pts

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