A 200.0 mL buffer solution is 0.260 M in acetic acid and 0.260 M in sodium acetate.

1) What is the initial pH of this solution?

2) What is the pH after addition of 0.0100 mol of HCl?

3) What is the pH after addition of 0.0100 mol of NaOH?

in C++, given a binary search tree of ints, in which each node contains a size parameter (also an int), explain, in English, not code, how you would find the median element of the tree in theta(log N) time.

It describes the properties of dangerous goods, but which of the following is incorrect? (1) Yellow phosphorus is a white or pale yellow aromatic waxy solid. (2) Calcium phosphide is a reddish brown lump and reacts with water to produce toxic gas. (3) Calcium carbide is pure white solid. When nitrogen is passed at a constant temperature, it becomes lime nitrogen. (4) Sodium is a bright silver-white metal with a specific gravity of less than 1. (5) Potassium is a bright silver-white soft metal with a specific gravity of less than 1 and a lower melting point and boiling point than sodium.

1) For the following hypothetical changes in astronomical bodies answer whether the change would make the specified property Larger, Smaller, or Not Changed.

If the radius of the Earth were larger, the force of gravity on objects on its surface would be .....
Larger Smaller Not Changed  

If the mass of the Sun were half as much and the Earth kept the same distance, the period of the Earth's orbit would be .....
Larger Smaller Not Changed  

If the mass of an object dropped on the surface of the Moon were increased, the acceleration of the object would be .....
Larger Smaller Not Changed

If the amount of ozone in the upper atmosphere of a planet is increased the amount of ultraviolet light reaching the surface will be ....
Larger Smaller Not Changed  

If the mass of Mars were greater, the acceleration due to gravity on its surface would be .....
Larger Smaller Not Changed  

If the distance between two planets is increased, the force of gravity is .....

2)

Classify the following statements as True or False based on the Nebular Theory for Solar System formation.
True /False  Rocky, metallic materials as well as volatile materials (He and H compounds) collected into planets near the Sun where the cloud is hot.
True/ False  Material for the planets was left over from the formation of the Sun.
True /False  Most of the thermal energy which started fusion reactions in the Sun originated as thermal energy in the large, hot dark nebula.

A piston contains 600 moles of an ideal monatomic gas that initally has a pressure of 2.44 × 105 Pa and a volume of 1.8 m3. The piston is connected to a hot and cold reservoir and the gas goes through the following quasi-static cycle accepting energy from the hot reservoir and exhausting energy into the cold reservoir. The pressure of the gas is increased to 5.44 × 105 Pa while maintaining a constant volume. The volume of the gas is increased to 8.8 m3 while maintaining a constant pressure. The pressure of the gas is decreased to 2.44 × 105 Pa while maintaining a constant volume. The volume of the gas is decreased to 1.8 m3 while maintaining a constant pressure. It may help you to recall that CV C V = 12.47 J/K/mole and CP C P = 20.79 J/K/mole for a monatomic ideal gas, and that the number of gas molecules is equal to Avagadros number (6.022 × 1023) times the number of moles of the gas. 1) How much energy is transferred into the gas from the hot reservoir? J 2) How much energy is transferred out of the gas into the cold reservoir? J 3) How much work is done by the gas? J 4) What is the efficiency of this cycle?

Explain, If a device is configured with bandwidth and duplex settings on automatic, does the device at the other end of the connection have to be set to automatic as well?Explain, If a device is configured with bandwidth and duplex settings on automatic, does the device at the other end of the connection have to be set to automatic as well?

Describe how congestion taxes have been implemented in different cities.

Which regions of the U.S. have been affected the most by the recession? What are the main reasons for their economic downfall? What is the poverty rate in America? Which groups of the population have been affected the most? Which regions?

How does the U.S. compare with the rest of the rich countries in the world in terms of poverty rates and middle-class income?

An outer wall is covered by insulating material in order to reduce heat loss. Across which layer (bricks or insulation) is the temperature drop is the largest?

7. A 1100-kg car is moving toward the north along a straight road at a speed of 20.0 m/s. The driver applies the brakes and the car comes to rest in a distance of 140 m.

(a) If the road is completely level, what is the constant force applied to the car to bring it to rest? (Remember to specify the direction.)

(b) If the road goes down a hill at a 4� angle with respect to the horizontal, what is the constant force applied to the car to bring it to rest?

(c) What is the source of the force that brings the car to rest? (In other words, what is exerting the force on the car?) Explain your answer clearly.

Create a script that take a directory path from the user. What I want you to do is figure out the total size of all files in the directory. You will need to import the os module for this.

• dirs=os.listdir(DIRECTORY) where DIRECTORY is the direction you want to look at will return a list of all files in that directory.
• You can then use a for loop to go through dirs much like you went through a range in the previous examples you saw. Start by doing this and printing out the name of each file found.
• Once you have that working create a total variable and use os.path.getsize(FILE) where FILE is the file's size you want to add the file size to total.
• Print out the total size for all files in the directory. Note that the result is in bytes.
• Use an if statement to print the total out in KB if the total is over 1024. If it is not, simply print the total in bytes.
• Finally add to your program to also calculate the average size of a file in the given directory.

b)Social
c)Technological
d)Market
e)None. All of the above are major kinds of globalization drivers

a)existed before the time of Christ.
c)B and D.
d)was influenced by the rise of the Ottoman Empire.

b)more liberal
c)harsher
d)more confronting
e)A and C

b)if they are going to work in a firm with no foreign operations.
c)Neither A nor B because they can learn on the job.
d)Both A and B.

8.International business differs from domestic business in that a firm operating across borders must deal with

b)C and D.
c)the foreign environment.
d)the international environment.
e)the domestic environment.

b)international business.
c)the Pacific Rim.
d)foreign exchange.

Develop a simple GUI-based Java program that may be used to control a lighting system

Product innovation includes designing innovative products and getting them to market quickly. In a world where the design, production, and consumption may be on different continents, describe how an ERP system help facilitate product innovation.

The Lifang Wu Corporation manufactures two models of industrial robots, the Alpha 1 and the Beta 2. The firm employs 5 technicians, working 160 hours each per month, on its assembly line. Management insists that full employment (that is, all 160 hours of time) be maintained for each worker during next month’s operations. It requires 20 labor-hours to assemble each Alpha 1 robot and 25 labor-hours to assemble each Beta 2 model. Wu wants to see at least 10 Alpha 1s and at least 15 Beta 2s produced during the production period. Alpha 1s generate a $1,200 profit per unit, and Beta 2s yield $1,800 each.

a. How many Alpha 1's should be produced?                            [ Select ]   

b. How many Beta 2's should be produced?                            [ Select ]   

c. What is the overall profit level?                            [ Select ]

d. If the overall hours were increased by 20, how much would the profit increase?