photoelectric physics lab

Even though this experiment is mathematically simple, its conceptual significance is immense. Explain how the experiment confirms the quantized nature of photon energy. How is the connection established between wave and particle theories of light? How are we able to see that electrons in atoms exist in discrete energy orbitals?

1 for each of the problems listed below write the c++ program while using WHILE loop structures

A program will display each term in the following sequence

1 -10 100 -1000 10000 -100000 1000000

A program will calculate and display the corresponding celsius temperatures for the given Farenheit ones from 0f to 212 f (hint c=(f-32/1.8)

A parallel plate capacitor with plate separation d is connected to a battery. The capacitor is fully charged to Q Coulombs and a voltage of V. (C is the capacitance and U is the stored energy.) Answer the following questions regarding the capacitor charged by a battery.

For each statement below, select True or False.

1. With the capacitor connected to the battery, increasing d increases U.

2. After being disconnected from the battery, inserting a dielectric with κ will decrease V.

3. With the capacitor connected to the battery, decreasing d decreases Q.

4. After being disconnected from the battery, inserting a dielectric with κ will increase U.

5. After being disconnected from the battery, inserting a dielectric with κ will decrease C.

6. After being disconnected from the battery, decreasing d increases C.

The pkb values for the dibasic base B are pkb1 = 2.10 and pkb2 = 7.34. Calculate the pH at each of the following points in the titration of 50.0 mL of a 0.50 M B(aq) with 0.50 M HCl (aq).

a) before addition of any HCl d) after addition of 75.0 mL of HCl

b) after addition of 25.0 mL of HCl e) after addition of 100.0 mL of HCl

c) after addition of 50.0 mL of HCl

What are the identified weaknesses in your organization’s Compensation
System? Suggest better models for the company.

Deducing a Reaction Mechanism for the Isomerization of Maleic acid to fumaric acid. I'm completing my organic chemistry lab report and answering questions and I have very confused and would appreciate any help and explanation please. I appreciate it.

Possible Mechanisms for the Isomerization.

1. Maleic acid is activiated by visible light, and then rearranges to form fumaric acid. In this mechanism, the pi-bond is momentarily broken, allowing for the free rotation to give the more stable trans isomer. The double bond then reforms.

2. The rearrangement of maleic acid to fumaric acid is accomplished by the thermal excitation of the molecule. In this mechanism, the pi-bond is broken by the application of heat. As described above, this would allow rotation to occur and form the more stable trans isomer.

3. A nudeophilic addition of a chloride ion to maleic acid again permits free rotation, followed by release of the Cl- ion to produce fumaric acid.

4. An electrophilic addition of a proton to maleic acid, followed by rotation and then deprotonation.

5. Water adds to maleic acid (under acid catalysis) to form laic acid. Malic acid then rotates to a new conformation and elimenates water to form fumaric acid.

6. The addition of a proton to maleic acid leads to the formation of a lactone (cyclic ester) which undergoes a ring opening reaction to yield malic acid. Malic acid is then dehydrated to give fumaric acid.

7. A proton adds to the carbonyl oxygen to give an intermediate with a number of resonance structures. One of these resonance structures can freely rotate and deprotonation to give fumaric acid.

8. A proton adds to the carbonyl oxygen, followed by an addtion of a chloride ion. The product of this 1,4 addition then undergoes a free rotation, and hydrochloric acid is eliminated to produce fumaric acid.

So, I understand that I can go through a process and eliminate the first 7 reaction mechanisms to chose the last one #8 is close to the true state of affairs.

But I am struggling answering these questions, if anyone can help and provide an explanation I'd greatly appreciate it.

Questions #1: 1. Is visible light solely responsible for the isomerization of maleic acid to fumaric acid? Explain.

2. If the isomerization of maleic acid to fumaric acid is a thermal effect, which test tubes should contain fumaric acid?

3. For mechanism 3 to be correct, which test tubes should contain fumaric acid?

4. For mechanism 4 to be correct, which test tubes should contain fumaric acid?

5. For mechanism 5 to be correct, which test tubes must contain fumaric acid?

6. Which test might rule out mechanism 6 as a possibility?

7. For mechanism 7 to be correct, which test tubes must contain fumaric acid?

8. For mechanism 8 to be correct, which test tubes must contain fumaric acid?

Then these questions:

1. Does sulfuric acid, which ionizes to give a negatively charged sulfate ion, induce the isomerization of maleic acid to fumaric acid? Explain.

Anybody answer this?

A 8.0 V potential difference is applied between the ends of a 0.80 mm -diameter, 25 cm -long nichrome wire. What is the current in the wire?

In 250 words Consider some of the terms used to refer to the decades between World War 1 and World War 2 1918-1945. The Roaring Twenties, The Jazz Age, The Golden Age, The Age of Intolerance, etc. what you know about this historical time period and what these terms reference (significant events, cultural behaviors, political issues)? How is this period in history stereotyped or remembered? please type

2D object transformations(Use NetBeans IDE)
Task: create a program that realizes 2D transformations for 2D object with at least three
control points:
• Movement
o The user must be able to input the movement step (in pixels)
o The movement can be controlled with keyboard cursor keys (←↑→↓)
• Scaling
o The user must be able to input the scaling parameters
o The scaling should be controlled with keyboard keys (for example "Page
Up", "Page Down")
• Rotation
o The user must be able to input the angle of rotation (in degrees)
o The user must be able to input a point, around which the object will rotate
(X, Y)
o Automatic rotation must be implemented, the user pushes a button and the
object begins to rotate around the given point (animation using timer)

where does the formula v = sqr(2gh) come from (what formula is it a simplification of and how)

Calculate the moment of inertia of the letter E rotating about its lower horizontal segment. In other words, the lower segment is the axis of rotation. The length of each horizontal segment is L, and the length of the vertical segment is 2L. The total mass of the system is M, and all segments have the same linear density. FYI, the moment of inertia of a thin rod about one end is 1/3 x mass x (length)2 .

You are getting ready to start a new project that will incur some cleanup and shutdown costs when it is completed. The project costs $ 5.39 million up front and is expected to generate $ 1.17 million per year for 10 years and then have some shutdown costs at the end of year 11. Use the MIRR approach to find the maximum shutdown costs you could incur and still meet your cost of capital of 14.9 % on this project. The maximum shutdown costs allowable to still have a positive NPV is ​$ nothing. ​(Round to the nearest​ dollar.)

What are some explanations for a yield going above 100%? Referring specifically to a yield produced when re-using products from a previous experiment (re-using recovered NaI to produce CuI).