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An object of mass 4 kg is moved on a horizontal surface with a constant acceleration of 0.2m/s^2 , by a horizontal force of 6 Newtons. Find the friction force acting on the object and the coefficient of friction.
Internal energy of certain thermodynamic system is given by 𝑢 = 25 + 0.25𝑇 where T
is temperature in ℃. When the system execute a process, work done per degree
temperature change is given by 𝑑𝑊
𝑑𝑇
= 350√𝑇 N-m, find the heat transferred when the
temperature changes from 100℃ 𝑡𝑜 200℃.
Write a console application that uses at least five different method of math class. Provide a meaningful identifier of the variables are constant. Name the namespace as mathApp and it's class as mathProgram.
Write a recursive function that returns number of occurrences of a certain letter in a given string.
Let the function prototype be int countLetter(char letter, string str). For example, if
letter = "l" and str = "lollipop", the function should return 3.
Write console application that initializes at least five variables or constant with different data types then display their values. Provide a meaningful identifier of the variable or constant.
Ø Calculate the entropy change, ΔSO for the following reactions using tabulated standard entropy values and figure out if the resulting values obtained are consistent with the expected entropy change as predicted qualitatively.
a. thermal decomposition of NaNO3
2 NaNO3(s) ---> NaNO2(s) + O2(g)
SO values at 25°C
NaNO3(s) = 116.5 /mol-K
NaNO2(s) = 103.8 J/mol-K
O2(g) = 205 J/mol-K
Create a console program that will perform the following:
•
Ask the user to enter five (5) grades
•
Compute the average of the grades
•
Round of the average using method of Math class
Example output:
Enter 5 grades separated by new Line.
90
83
87
98
93
The average is 90.2 and round off to 90.
Which of the following species is the least nucleophilic? Justify
(A) (CH3)3CO- (B) H2O (C) (CH3)3N (D) BF3 (E)CN?
Which isomer undergoes SN1 reaction most rapidly? Justify.
(A) 1-bromo-1-butene (B) 2-bromo-1-butene
(C) 3-bromo-1-butene (D) 4-bromo-1-butene
Change Q= x² + 2y² + 2z² - 2xy - 2yz + zx into real canonical form and find its rank and signature.
