1% of pollution
na lake is Db-P b) how much can be cuadh y D, 42 PIC ab
na lake is Db-P b) how much can be cuadh y D, 42 PIC ab
Short Assume that the Economy of a Province in China can be modelled according to the Leontief Input-Output equations shown below Assume, Y = amount of production in the agricultural sector, X-amount of production in the industrial sector (1) x 0.5x + 0.3Y 12 (2) Y = 0.4X + 0.2Y + 8 a. Calculate the amount of X and Y that this province should produce to avoid shortages and surpluses. b. Briefly explain the problems that policymakers c. What other...
Consider the dynamics of a directly transmitted viral microparasite to be modelled by the system 1 d X dY where b, B and r are positive constants and X, Y and Z are the number of suscep- tibles, infectives and immune populations respectively. Here the population is kept constant by births and deaths (with a contribution from each class) balancing. Show that there is a threshold population size, Ne, such that if N < Nc = (b + r) the...
A ball, which can be modelled as a hollow sphereical shell, with
a mass, m, radius, r, and an initial velocity of Vo
rolls down a hill that has a height, h. Assuming no friction or
sticking the velocity at the bottom of the hill can be given by; a,
b, c, d?
17 5 2 5 5 7 7
Problem1 10" ㎝aandn-side Callibrium at 3000 K has ap side dup ing of NA-2 doping of ND-101 cm Calculate: (a) The contact potential (also called built-in voltage) (b) The depletion layer width at the p-side and n-sides, and the total depletion layer width. (c) The electric field at the metallurgical junction. (d) The potential at the metallurgical junction. (e) Make sketches of the charge density, electric field and electrostatic potential as a function of position, that are roughly to scale....
2. For the circuit shown in Figure 4, assume the diode can be modelled by a Constant- Voltage Drop (CVD) (VD[on) = 0.7 V) for d.c analysis. 10 mA 5502 Zc = 0 int) DV D3 D2 V 100 sin(wt) mV vo(t) 1k 12 } 3k 22 Figure 4 (a) Determine the diode d.c current loi, Ioz, 103, Io and V. Check your assumptions. (b) Determine the output ac current, id and voltage, vd (c) Determine the output total current,...
please do do 1 a,b,c,d,e
and 2 a, b
Text exercise 26 Determine where each of the following funct (b) wz+5 Demonstrate that each of the following is harmonic and obtain 78 1 fails to be regular, bra) w = (2-4)(2+1) 2 conjugate function. u(x,y)= sinh x cos y u(x, y) = 4y(1 + 3x). (a) nb)
The depth (D metres) of water in a harbour at a time (t hours) after midnight on a particular day can be modelled by the functionD = 2 sin (0.5t - 0.6) + 5, t < or = 14where radians have been used.Select the two options which are correct statements about the predictions based on this model.Select one or more:The smallest depth is 5 metres. The largest depth is 7 metres.At midnight the depth is approximately 3.9 metres.The time between...
can some explain the steps for this
y a na the eflect on the equilibrium PHU IS Unce . 28) The demand curve is P = 700 - 20QD. The supply curve is P-300 + 200s. At market equilibrium, the equilibrium quantity is and the equilibrium price is A) 20; 0.10 B) 10,500 C) 500; 10 D) 400; 40 E) 0.10; 20
12 10 marks] Algae is growing in a fish tank. The biomass z(t) of the algae at time t is modelled by the Malthusian model dz dt = (b-d)2. Suppose that we buy a chemical that is intended to reduce the amount of algae. If the dosage of the chemical is p, then the birth and death rates of the algae are affected as follows: d(p)=2 and p) (a) On the same set of axes, sketch the graphs of the...