The system consists of 3.60 g of H2O in a diathermic cylinder sealed from the outside by a freely movable massless piston. In the initial state, the system is completely in the vapor phase, H2O (g), at 100. o C and 1.00 atm and is in equilibrium with the surroundings. In the final state, as a result of transferring heat away from the cylinder, the system is completely in the liquid phase, H2O (l), at 100.o C and 1.00 atm. Calculate the compression work, w, (in Joules with three significant figures) associated with the complete condensation process of 3.60 g of water vapor at 100.o C and 1.00 atm. In this question, you will assume the final volume of 3.60 g of water liquid at 100.o C and 1.00 atm to be zero in your calculations. To calculate the volume of vapor, you can again assume that water vapor behaves as an ideal gas. How do the results obtained in Questions 1 and 2 compare? What can you conclude from this comparison?

mechanical vibration

Consider a single cylinder engine such as the one shown here where r is the radius of crank (5.0 cm), l is the length of the connecting rod (16 cm), M_p is the effective mass of piston (1.5 kg), M is total mass of engine (75 kg), w is the engine speed (24p rad/s), k is the spring constant (220 KN/m), and z is the damping ratio (0.02). Assume that the crank and the remaining portion of the connecting-rod mass, which is considered concentrated at the crankpin, is balanced so that its center of gravity is at the axis of rotation O; determine

Equation of motion for the system

Exciting force of the engine and plot it for 30 seconds using 600 equal time intervals.

Absolute maximum steady-state amplitude of the engine

Plot the steady state time responses for the displacement and velocity of the engine for 30 seconds using 600 equal time intervals.

contect my e m a i l l for more information ( [email protected])

A sample of gas with a thermometer immersed in the gas is held over a hot plate. A student is asked to give a step-by-step account of what makes our observation of the temperature of the gas increase. His response includes the following steps.

(a) The molecules speed up.
(b) Then the molecules collide with one another more often.
(c) Internal friction makes the collisions inelastic.
(d) Heat is produced in the collisions.
(e) The molecules of the gas transfer more energy to the thermometer when they strike it, so we observe that the temperature has gone up.
(f) The same process can take place without the use of a hot plate if you quickly push in the piston in an insulated cylinder containing the gas.

(i) Which of the parts (a) through (f) of this account are correct statements necessary for a clear and complete explanation? (Select all that apply.)

(ii) Which are correct statements that are not necessary to account for the higher thermometer reading? (Select all that apply.)

(iii) Which are incorrect statements? (Select all that apply.)

Part 2: Avogadro’s number estimation
Although Avogadro’s number is a huge number, it is possible to estimate it by a simple
experiment. In the experiment a monolayer of stearic acid (SA) molecules is formed on the
surface of water. Based on the amount of SA necessary to cover the surface and the given cross-
sectional area of one SA molecule, Avogadro’s number can be calculated.
A group of students performed the following
experiment using a glass container with the
diameter of 14.5 cm. They started by filling up
the container with water to the rim. Then they
were adding drop by drop stearic acid (SA) on
the surface of water. One drop of SA solution
was measured to contain approximately 1.4 x
10-6 g of SA. In their experiment students
found that 27 drops were enough to create a monolayer of SA on the water surface. In another
experiment the cross-section area of one SA molecule in a monolayer was found to be 0.21 nm2.
The molecular formula of stearic acid is C18H36O2.
a) Discuss with your group how you can use the results of this experiment to estimate
Avogadro’s number. List all the steps in the proposed calculation.
b) Follow the steps to complete the calculation and answer the following question: Do you
think the students performed a successful experiment? Explain.
Hint: use the following formula to calculate surface area of water:
??????? ???? ?? ????? = ??
2

Write a rational number class in C++. Recall a rational number is a rational number, composed of two integers with division indicated. The division is not carried out, it is only indicated, as in 1/2, 2/3, 15/32. You should represent rational numbers using two int values, numerator and denominator.

A principle of abstract data type construction is that constructors must be present to create objects with any legal values. You should provide the following two constructors:

1. one constructor to make rational objects without any argument. The constructor sets the rational object's numerator to 0, and denominator to 1.
2. one constructor to make rational objects out of pairs of int values, i.e., a constructor with two int parameters. The constructor uses the two values to initialize the rational object's numerator and denominator respectively.
3. one constructor to make rational objects out of a single int values, as in 2/1, 17/1, i.e., a constructor with only one int parameter. The constructor sets the rational’ s numerator to the given parameter and sets the denominator to 1.

Remember the rules for a rational number. You constructor (and every mutator function) must enforce the rules!

EXTRA CREDIT: Feel free to write one constructor with default values.

You should also provide the following member functions:

1. an input function that reads from standard input the value for current object. The input should be in the form of 2/3 or 27/51. [Enforce simple rules for rational numbers.]
2. an output function that displays the current object in the terminal. The output should also be in the form of 2/3, i.e., numerator/denominator.
3. Two getter functions that return the numerator and denominator respectively.
4. a Sum function that takes two rational objects as parameters. It sets the current rational object to be the sum of the two given rational numbers.

Note the following formula for adding two rational numbers:

a/b + c/d = ( a*d + b*c)/(b*d)

Starter code:

int main()
{
  // ToDo: declare three rational objects using the default constructor
char answer;

// Main loop to read in rationals and compute the sum
do {
cout << "\nEnter op1 (in the format of p/q):";
  // ToDo: use your input member function to read the first rational

cout << "\nEnter op2 (in the format of p/q):";
  // ToDo: use your input member function to read the second rational

  // ToDo: use the third rational to call Sum with first and second as parameters

cout << "\nThe sum of op1 and op2 is:";
  // ToDo: ouptput the third rational

cout << endl;
cout << "\nTry again (Y/N)?";
cin >> answer;
} while (answer == 'y' || answer == 'Y');

  // ToDo: test getters on rational that has the sum above.
cout << "\nC's numerator is: " ;
cout << "\nC's denominator is: ";

    // TODO: Use two constructors to declare a whole number 3/1 and a 4/5

    // TODO: Use output to print both rationals

return 0;
}

Sample output:

Enter op1 (in the format of p/q): 3/4
Enter op2 (in the format of p/q): 4/5
The sum of op1 and op2 is: 31/20

Try again (Y/N)? 
Enter op1 (in the format of p/q): 9/0
wrong input.
Enter a rational (p/q):9/3

Enter op2 (in the format of p/q): 4/31
The sum of op1 and op2 is: 291/93 
Try again (Y/N)? 

C's numerator is: 291 
C's denominator is: 93 
3/1 4/5

The number 52430 is a 5-digit number whereas 03201 is not a 5-digit number. Determine the
number of 5-digit multiples of 5 that can be created using the digits 0 to 9, if digits may not be
repeated

The table shows the number of confirmed COVID-19 infected cases, number of death and number of recovered cases in four countries according to 5/4/2020 global record. The total confirmed cases around the world is 1249636, the total number of death around the world is 68069, and the total number of recovered cases around the world is 256860.

Calculate the following:

1-     The % of death of the number of the infected cases in each of the four countries.

2-     The % of death of the total recorded death cases around the world in each of the four countries.

3-     The % of the recovered cases of the infected cases in each of the four countries.

4-     The % of the recovered cases of the total recovered cases around the world in each of the four countries.

5-     The % of COVID-19 infected cases of the total confirmed cases around the world for each of the four countries.

Find the probability P(Z < −2.28)