MATH REVIEW VIDEOS

This website can help you review the basic math questions asked on the test.

www.khanacademy.org

FREE ONLINE CLASSES

If you are interested in learning and continuing education, there are some quality online classes offered by high ranking world universities such as MIT, Harvard, Stanford, etc. There are multiply courses that you can take all for free. I have taken over ten courses on the Edx website led by MIT and they are just amazing. Check these out!

1.  www.edx.org

2.  www.coursera.org

3.  www.udacity.org

QUESTIONS FOR THE DAY

1. Which of the following will occur if a positively charged rod is brought close to the plate of an electroscope.
A. The gold leaves will move closer together.
B. The gold leaves will move move apart.
C. The gold leaves will not move at all.

2. Which of the following will occur if a negatively charged rod is brought close to the plate of an electroscope.
A. The gold leaves will move closer together.
B. The gold leaves will move move apart.
C. The gold leaves will not move at all.

3. Which of the following will occur if a positively charged rod is brought close to the plate of an electroscope.
A. The positive charges will be attracted to the plate.
B. The negative charges will be attracted to the plate.
C. The gold leaves will move closer together.

4. Which of the following will occur if a negatively charged rod is brought close to the plate of an electroscope.
A. The positive charges will be attracted to the plate.
B. The negative charges will be attracted to the plate.
C. The gold leaves will move closer together.


Answers:   1.  B        2.  B        3.  B        4.   A  

THE ELECTROSCOPE

The electroscope is a device used to determine the presence and magnitude of charges. That is, it helps you to determine whether on object is charged or not. It also helps you to determine the type of charge.
You can easily make an electroscope at home. Click here to see a simple electroscope.

CHARGING OF MATTER

An object is said to be charged when it gains or loses an electron. There are three ways to charge matter. 

• Charging by friction
• Charging by contact 
•  Charging by induction

Charging by Friction: When you rub two non-conducting materials on each other, they are charged by friction. The material that loses the electron is positively charged and the one that gains the electron is negatively charged. The amount of electrons gained and lost is equal to each other. Example: When a glass rod is rubbed on silk, the glass rod loses electrons and becomes positively charged while the silk gains electrons to become negatively charged.

Charging by Contact: When a charged object comes into contact with a neutral material, the charge on the charged object is transfer to the neutral one.

Charging by induction: Consider two conductors, A and B, that are neutral at the beginning. 

___________________

        A                B           

When a positively charged plate is brought near them, it attracts the electrons in the conductors.

               +                      A               B           

 Electrons move to the left part and protons stays. 

      +                  --    A               B     ++      

When  plates A and B are separated they are charged by induction. Note that is no contact between the positively charged plate and the two conductors. They are charged only by induction and conductor  A becomes  negatively charged and B becomes positively charged.

    --    A                              B     ++      

This is a link to an animation on charging an electroscope.

CRITICAL THINKING AND ANALYSIS - PART 2

The following table shows the volume of 0.1 mol/L NaOH added to 15 mL of 0.1 mol/L HCl in a titration experiment.

1) What is the volume of NaOH added at the equivalence point?

A. 30.0 ml

B. 15.0 ml

C. 0 ml

D. 17.5 ml

2) What is the pH of the acid at the beginning of the titration?

A. 12.5

B. 7.0

C. 1.0

D. 0

3) What is the volume of NaOH added when the pH was 12.3?

A. 20.0 ml

B. 25.0 ml

C. 22.5 ml

D. 17.5 ml

4) What was the volume of NaOH added when the acid was neutralized?

A. 30.0 ml

B. 15.0 ml

C. 0 ml

D. 17.5 ml

Answers: 1.  B   (Since NaOH is a strong base and HCl is a strong acid, the equivalence point occurs at pH of 7.)    2. C        3.  C       4.  B  (pH of 7 is the neutralization point)

CRITICAL THINKING AND ANALYSIS - PART 1

One of the areas in which you will be tested on is the area of analysis and critical thinking. These areas test your ability to read and interpret diagrams and to make sense and conclusions out of given information. For example, given the label below:



1. Which of the following conditions can destroy the potency of the drug?
      A. Storage within the temperature range of 68-77 degrees Fahrenheit
      B. Storage in a humid and wet closet.
      C.  Storage at normal room temperature.
      D. There is not enough information on the label.

2. Which of the following can result in unwarranted effects of the drug?
      A. Alcohol
      B. Tranquilizers
      C.  Sedatives
      D. All of the above

3. What are the indications for using this drug?
      A. Glaucoma
      B. Chronic bronchitis
      C. Hay fever with itchy throat
      D. Enlarged prostate

4. A person taking this drug must be careful when driving or using machinery, because ______ .
     A. It relaxes the muscles
     B. It causes irritation of the nerves
     C. It causes drowsiness
     D. All of the above is true

5. Which of the following symptoms will the drug relieve?
     A. dizziness
     B. drowsiness
     C. diarrhea
     D. Itchy throat and watery eyes

6. Care should be taken if the person has  the following conditions:
     A. Prostate enlargement
     B. Upper respiratory allergies
     C. Glaucoma
     D. A and C both correct

7. The active ingredient, chlorpheniramine maleate, is classified as ____________ .
     A. Antihypertensive drug
     B. Antiepileptic drug
     C. Antihistamine drug
     D. Antiglaucoma drug

8.  The following are components of the drug:
     A. Lactose and sucrose
     B. Lactose and magnesium stearate
     C. Microcrystalline cellulose and maltose
     D. Microcrystalline cellulose and sucrose


Answers: 
1. B    2. D   3. C    4. C     5. D     6. D       7. C      8. B

BE ENCOURAGED, NEVER GIVE UP!

Today, we will take a little break from the academics and to enjoy this inspirational message. Believe in your abilities and capabilities to brace the storms of life to be able to soar high up in the skies beyond reasonable comprehension.  It is fact that God has equipped you with the necessary tools so that you can do all things if you apply yourself diligently it. We all have the potential to succeed if we look beyond our short-falls, weaknesses, disabilities, challenges, and whatever our socioeconomic backgrounds may be. 

As in the poem by Longfellow:

 The heights by great men, reached and kept;
 Were not attained by sudden flights;
 But they, while their companions slept,
 Were toiling upward in the night.

It takes hard work to make it into a  nursing school and to sail through it to the end. Working hard will not break your bones! Apply yourself to your set goals and in the end, you will succeed.

Keep learning!
The best of luck in all your endeavors!