Questions asked
List 2 BIM-based tools that can improve the decision-making process in building projects, explaining your choices.
Why is hypertension called a silent killer or silent disease? Signs and symptoms are not noticed or missed. There is no treatment available. No one wants to discuss it. Patients do not die from hypertension.
All of the following are assumptions MMM uses in calculating the time to retirement except Group of answer choices you want your investment portfolio to last forever your withdrawal rate is 4% inflation is 0% real stock returns are 5%
What are the two types of photoreceptor cells found in the retina? Spheres and cones Cones and prisms Rods and cones Rods and sticks Rods and cylinders
Which number property shows that the two sides of the equation are equal
The time-averaged potential of a neutral hydrogen atom is given by: $V(r) = q \frac{e^{-\alpha r}}{r} (1 + \frac{\alpha r}{2})$, where q is the magnitude of the electronic charge $\alpha^{-1} = a_0/2$ and $a_0 = \frac{h^2}{m_e q^2}$ is the Bohr radius. 1. Find the continuous and discrete charge distribution that creates such a potential and physically interpret your results. 2. What is the net charge inside a sphere of radius $a_0$? 3. Calculate the magnitude of the electric field measured in $r = a_0$
QUESTION 2 (a) The classical Drude theory of conductivity of metals states that electrons behave as a gas, diffusing through a crystal and scattering from atoms in the lattice. How does quantum band-theory explain why electron waves don't constantly scatter off the lattice atoms in the crystal? (b) Explain, with sketches of the E(k) relationship in the reduced zone scheme, the concept of effective mass and how it relates quantitatively to the bandstructure. (c) A piece of pure metal has a conductivity of 3.65x10$^5$ ohm$^{-1}$cm$^{-1}$, a carrier concentration of 5.85x10$^{22}$ cm$^{-3}$, and an effective mass of 0.89m$_e$. At time t=0 an electric field E=1V/m is applied for 1ps (10$^{-12}$ s), then turned off. i) Paying attention to units, calculate the maximum electron velocity ii) Sketch a numerically labelled graph of the electron velocity as a function of time. iii) Sketch an equivalent graph for an electron in free space, and explain the difference
Calculate the pH of 530 mL of a 0.296 M solution of hypochlorous acid before and after the addition of 9.70×10^-2 mol of sodium hypochlorite. pH before: pH after:
Question 6 0/1 pts Which of the following is NOT a function from the set A = {0,1,-1} to the set B = {1,2,3}? {0,3,1,3} {0,1,1,2,-1,0} {0,1,1,2,-1,3} {0,1,1,1,-1,2}
10 answered i) out of ii) question iii) iv) Which of the following is true of the direct file organization: Records are not stored physically one after another according to the key field Records can be stored on sequential as well as direct access devices Locating a record in this file organization requires only the record key It makes possible update of several files as a result of a single transaction Select one: ? A. ii, iii and iv only B. ii, iii and iv only ?C. All i, ii, iii and iv D. i, iii and iv only order
