# Physics 1112/1114 General/Basic Physics 物理代考力学热学声学光学电学物理学代写

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# ECON 120A: Econometrics 计量宏观微观经济学代考金融财务会计代写代做

1. a) The null: The proportion of registered voters who are planning to vote for the incument president <0.5
The alternative: The proportion of registered voters who are planning to vote for the incument president ≥0.5
b) Test statistic=(636/1200-0.5)/sqrt(0.5*0.5/1200)=2.08
c) CV is Z0.05=1.64
d) From the standard normal table, the p-value for the test statistic, z = 2.08 is 1-0.9812=0.0188.
e) Since p-value is lower than 0.05, we reject the null and conclude that the proportion of registered voters who are planning to vote for the incument president increases significantly at 5% significance level.
f) We say the proportion of registered voters who are planning to vote for the incument president increases significantly, while in fact it does not.
g) We say the proportion of registered voters who are planning to vote for the incument president does not increases significantly, while in fact it does.

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def code(*args):
res = list()
if len(args) == 0:
return res

if len(args) == 1:
for a in args[0]:
res.append([a])
return res

i = 0
while i < len(args[0]) and i < len(args[1]):
res.append([int(args[0][i]) + int(args[1][i])])
i += 1
return res

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# Quantum Mechanics量子力学代考物理代写代做

Question 8
The primitive vectors of the face-centred cubic (fcc)lattice are Not yet
a = (a/2)(O,1,1), b = (a/2)(1,0,1) and c = (a/2)(1,1,0) answered
so that points on the Bravais lattice have position vectors,
Rn1,n2,n3 = n1 a + n2 b +n3 c
The constant a is the lattice parameter and n1,n2 and n3 are integers. What is the shortest distance (in units of the lattice para
nneter a,otice have)? [15
question
the lattice and,for a given point, how many points surrounding it are this far away (ie. how many nearest neighbours does a poimarks]
Select one:

1. distance= 0.5 a,9 nearest neighbours
2. distance = a, 12 nearest neighbours
3. distance =0.7071 a, 12 nearest neighbours
4. distance= 1a，8 nearest neighbours
5. distance = 0.5a, 2 nearest neighbours
6. None of these answers are correct
7. distance = 0.7071a, 6 nearest neighbours

# 全球top30 美国UC系高校Linear Algebra 线性代数代考满分

(a) State Cauchy-Buniakovski-Schwartz Inequality on an inner product space V . Don’t forget
to say when equality is attained.

(b) Prove that
(1 · 2016 + 2 · 2017 + 3 · 2018 + · · · + 2015 · 4030)2 < (12 + 22 + · · · + 20152) · (20162 + 20172 + · · · + 40302).
Explain why this is not an equality.

# 数学微积分代考 MAT232 Multivariable calculus数学代写final exam代考

Calculus（Single&Multi-variable）微积分Linear algebra 线性代数Probability theory 概率论Statistics 统计学Matrix Analysis 矩阵分析Complex analysis 复变分析Real analysis 实数分析Differential equations 微分方程Numerical analysis 数值分析Discrete mathematics 离散数学Abstract algebra 抽象代数/近世代数Combinatorics 组合数学Modeling 数学建模Number theory 数论Topology 拓扑学Geometry 几何

Q7 (10 points)
(Part A is worth 5 points; Part B is worth 5 points)
Leave numbers in generic form such as: $e^$, $\ln( )$, $\sqrt{*}$, etc., if applicable. No decimal numbers.
Part A. If $\displaystyle f(t) = 5\sqrt{t} – \frac{1}{t}$ for $t>0$ and $g(x,y) = x^2+y^2-5$, determine where $(f \circ g) (x,y)$ is continuous.
Part B. Given that $z=y^3 \sin(4x) + (x+x^2)^{\cos(x)}e^{-x^4} + \cos(3x) \arctan(y^2+1) \ln(y^3+42)$, find $\displaystyle \frac{\partial^2 f}{\partial x \partial y}$ when $x=\pi$ and $y=0$.
You must clearly and coherently justify your work – show your steps in your calculation. You cannot provide only the final answer. Circle your final answer for each part.

# 数学物理方程代考，美国代考，加拿大代考，澳洲代考，英国代考

Question 1)
(a) Show that, by choosing suitable values for P and Q, Green’s Theorem in the
plane leads to the formula for the area enclosed by a loop i.e.,
Area =
1
2 ˛loop
xdy − ydx
[2 marks]
(b) Use this to find the area of the closed curve defined by
x = cos 
y = 3 sin 
where 0 ≤  ≤ 2. [4 marks]
Question 2)
Consider the vector field, F = x2yz i+xy2z j+xyz2 k. Use the divergence theorem
to evaluate
” F · ds
over the surface of the unit cube defined by the ranges x = [0, 1]; y = [0, 1]; z = [0, 1].
[4 marks]
Question 3)
Consider the vector field F = (2x+yz) i+(2y+xz) j+xyk. Using Stokes’ theorem,
show that ¸ F · dr = 0 around any closed curve. [2 marks]
Question 4)
Consider the vector field, F = y i+x k. Use Stokes’ theorem to find ¸ F·dr around
the circular loop in the xy-plane defined by x2 + y2 = a2. [4 marks]
Question 5)
For gravity, g, we can define the divergence as, ∇ · g = −4G, where G is the
gravitational constant and  is the mass density. The divergence theorem states that,
“S
g · ds = °V
∇ · g dV.
By applying the divergence theorem to a point within the Earth’s radius, a distance
r from the centre:
(a) Draw a sketch showing a suitable choice of surface, S. [2 marks]
(b) Show that the magnitude of g is given by:
g(r) = −
4
3
Gr
(Assume that the Earth has a constant density.) [2 marks]
Question 6)
The square OABC lies in the xy-plane and is defined by the points:
O = (0, 0, 0);A = (1, 0, 0);B = (1, 1, 0);C = (0, 1, 0). The vector field, b, is given by,
b = 2yz i + (x2 − y2) j + (y + x2 − z2) k.
(a) Evaluate the line integral, I1 = ¸ b · dr, following the path O-A-B-C-O.
[4 marks]
(b) Determine ∇ × b. [2 marks]
(c) Evaluate, I2 = ˜OABC(∇ × b) · ds, over the square OABC. [4 marks]

# 数学代写|Real analysis实变分析代考，Complex analysis复变分析代考,数学代考

analysis是数学专业代数方向学生的必修课程，简单来说，复分析是描述解析函数性质的，实分析是描述解析函数性质的。

1. Let D  C be the intersection of the half planes y < 2x and y > 􀀀2x, where z = x +
iy 2 C. Find a conformal mapping of D onto the following domains:
a) Find a conformal mapping of D onto the right half plane.
b) Find a conformal mapping of D onto the unit disk D = fjzj < 1g.
c) Determine the automorphism group for D.
2. Given a 2 (􀀀1; 1) we wish to find a conformal map  of the slit disk D n (􀀀1; a]
onto the unit disk D such that (i=2) = 0. In order to do this proceed as follows:
a) Find a conformal map of D n (􀀀1; a] onto D n (􀀀1; 0].
b) Find a conformal map of D n (􀀀1; 0] onto D.
3. Let D = D n fjz + 1=2j  1=2g. Find a conformal map from D to D.
4. Consider the unit disk
a) Show that D is not conformally equivalent to C.
b) Find an analytic mapping f : D ! C such that f(D) = C.
5. Prove that the only entire functions f : C ! C which are injective (one to one) are the
linear functions f(z) = az + b.
6. Let Dj ; j = 1; 2; : : : ; be a sequence of simply connected domains such that Dj+1 
Dj  C for all j = 1; 2; : : : , and such that the interior D of \jDj is nonempty and
connected.
a) Prove that D is simply connected.
b) Pick any point z0 2 \jDj . Let gj : D ! Dj be a conformal map, normalized so that
gj (0) = z0 and g0
j (0) 2 (0; 1). Prove that the sequence gj ; j = 1; 2; : : : ; converges
locally uniformly on D to an analytic function g with the properties: if z0 2= D then g
 z0; if z0 2 D then g : D ! D is a conformal map.