Questions asked
A customer pays a company $$1,800$$ in advance of a future order. What is the impact on income from this event? Cannot be determined with the information provided. Income increases by $$1,800$$ Income decreases by $$1,800$$ No impact on net income.
Explain what the purpose is for homolactate fermentation in muscle undergoing contraction under anaerobic conditions. 2-4 sentences, clearly and properly giving scientific reasoning and correct terminology.
Find the equation of the tangent line to the curve y^3-3xy^2+cos3xy at the point (0,1). See Example 3 page 132 for a similar example.
3. In each of the following acid-base reactions, identify the Bronsted acid and base on the left, and their conjugate partners on the right: (a) $HCO_2^- + H_3AsO_4 \rightarrow HCO_2H + H_2AsO_4^-$ (b) $(CH_3)_2NH_2^+ + CH_3NH_2 \rightarrow CH_3NH_3^+ + (CH_3)_2NH$ (c) $C_6H_5NH_3^+ + OH^- \rightarrow C_6H_5NH_2 + H_2O$
6. The distribution of marks obtained by 10,000 students have mean 50 and standard deviation 15. Find (1) the number of students who scored more than 65 marks, (ii) the number of student who scored marks between 35 and 65. (in) the limits of the marks of middle 50% students. [ Ans.: (i) 1587, (ii) 6826, (iii) 40 - 60 ]
Find the reference angle for the angle 5.6. The angle is measured in radians, not degrees.
Integrate G(x,y,z)=2 over the sphere x^2 + y^2 + z^2 = 1 Write the integral ∫∫G(x,y,z) dV as a double integral. G(x,y,z) dV = ∫∫du dv
? 1.5 kmol/h of air (79% N2 and 21% O2, by mole) at 10 bar and 20° C is separated using polyethylene oxygen selective membrane with 0.2 µm skin thickness to produce a permeate stream with 0.378 mole% O2. • Calculate the nitrogen and oxygen permeabilities and the O?/N? selectivity • Estimate the retentate flow rate and composition. • Calculate the flux of N? and O? across the membrane assuming the permeate side is kept at 1 bar. • Calculate the require membrane area? $O_2$ $N_2$ Diffusivity, $0.46 \times 10^{-6}$ $0.32 \times 10^{-6}$ $cm^2/s$ Solubility, $2.0 \times 10^{-9}$ $1.0 \times 10^{-9}$ $\frac{kmol}{m^3 \cdot Pa}$
2. At 273 K a slab of silicon is doped with Boron atoms with impurity concentration of $10^{16} cm^{-3}$. What are the hole and electron concentrations? (For silicon, $B = 7.3 \cdot 10^{15} m^{-3}K^{-3/2}$, and $E_g = 1.12 eV$.)
(b) Assuming a silicon diode is used, analyse the following voltage divider circuit showing all steps to find the value of R? and explain how this design problem would be solved.(07) Here values of Ic and VCE at the Q pt. are as below; Ic = 1mA, VCE =5V
