Question

Use the semi-empirical mass formula to compute:

a. The mass difference between Cu-64 and Zn-64. [ans= -5.6 *10^-4]

b. The binding energy of the last neutron in Pb-207 [ans= 9 MeV]

Answer #1

The Semi-Empirical Mass Formula gives M (A, Z) = ZmH + Nmn − B
(A, Z) /c2 rewrite the SEMF as just a function of Z when A is a
fixed, odd, number. The minimum mass will occur when dM/dZ = 0. (a)
Find an expression, in terms of the SEMF coefficients, for the Z
value that has minimum mass with A fixed and odd. (b) Explain what
you would need to do differently for the case when A is...

Recall the method used to obtain a confidence interval for the
difference between two population means for matched samples.
(a) The following data are from matched samples taken from two
populations. Compute the difference value for each element. (Use
Population 1 − Population 2.)
Element
Population
Difference
1
2
1
11
8
2
7
8
3
9
6
4
12
7
5
13
10
6
15
15
7
15
14
(b) Compute d.
(c) Compute the standard
deviation sd. (Round
your answer...

Question 6
(a) Explain the difference between class limit and class
boundaries. [2 marks]
(b) Use the frequency table, Table 1, overleaf to answer the
following questions:
Table 1
X
f
0-9
3
10-19
14
20-29
11
30-39
5
(i) What is the class width?
(ii) What is the sample size?
(iii) What is the lower class limit of the first class?
(iv) What is the lower class boundary of the first class?
(i) What is the class width?
(ii)...

1) State the main difference between an ODE and a PDE?
2) Name two of the three archetypal PDEs?
3) Write the equation used to compute the Wronskian for two
differentiable
functions, y1 and y2.
4) What can you conclude about two differentiable functions, y1 and
y2, if their
Wronskian is nonzero?
5) (2 pts) If two functions, y1 and y2, solve a 2nd order DE, what
does the Principle of
Superposition guarantee?
6) (8 pts, 4 pts each) State...

Assignment III
1) Use the non-machine formula to calculate the variance and
standard deviation from the following data
Herd 1
67 62 69
72 68 68
71 69 65
71 70 64
64 66 71
67 75
2) What is the probability that one card selected from a deck of
52 is a club or a number card or both?
3) A container contains 10 green tennis balls and 7 orange
tennis balls. What is the probability of drawing 2...

You may use Microsoft Excel or any other technology to complete
the question as long as the explanation is clear and the file is
included.
Please complete the following problems:
1. Consider a sample with data values of 53, 55, 70, 58, 64, 57,
53, 69, 57, 68, and 53. Compute the mean, median,mode.
2. The results of a national survey showed that on average,
adults sleep 6.9 hours per night. Suppose that the standard
deviation is 1.2 hours and...

1. A cord of mass 0.65 kg is stretched between two supports 8.0
m apart. If the tension in the cord is 140 N, how long will it take
a pulse to travel from one support to the other?
2. A 50.0 Kg ball hangs from a steel wire 1.00 mm in diameter
and 6.00 m long. What would be the speed of a wave in the steel
wire?
3. The intensity of an earthquake wave passing through the earth...

1. For a pair of sample x- and y-values, what is the difference
between the observed value of y and the predicted value of y? a) An
outlier b) The explanatory variable c) A residual d) The response
variable
2. Which of the following statements is false:
a) The correlation coefficient is unitless. b) A correlation
coefficient of 0.62 suggests a stronger correlation than a
correlation coefficient of -0.82. c) The correlation coefficient,
r, is always between -1 and 1....

Bivariate Data & Probability
After completing the calculation by hand in Q1 you can use
Excel to check your answers before submitting. Q2 assesses your
general understanding of probability and linear associations using
Excel to analyse a large dataset.
Question 1
Covariance and Correlation
The table below shows a set of sample bivariate data. Calculate
the covariance and correlation coefficient by completing the below
table. Show all working.
X
Y
(X - )
(Y - )
(X - )(Y -...

1) There are two naturally occurring types of
copper, ^63Cu (62.92960 u) and ^65Cu (64.92780 u).
a) Given that the atomic weight of copper is 63.546 u, what are
the natural abundances of ^63Cu and ^Cu?
b) What makes ^63Cu different from ^65Cu. Be specific!!
c)Which copper is regular copper and which one is the
isotope?
2) Consider the following questions
a) Light takes 8 minutes and 19 seconds to reach from the sun to
the earth. The speed of...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 11 minutes ago

asked 20 minutes ago

asked 26 minutes ago

asked 30 minutes ago

asked 46 minutes ago

asked 56 minutes ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago