1. Rearrange solving problem steps?

( ) Perform algorithm

( ) Testing and debugging of the Program

( ) Define the outputs

( ) Documentation

( ) Define the inputs

( ) Problem Definition

( ) Coding (converting the algorithm into programming language)

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Questions

What solving problem steps?

1. ……………………………..

2. ……………………………..

3. ……………………………..

4. ……………………………..

5. ……………………………..

6. ……………………………..

7. ……………………………..

Q.2:What is meant by?

1- The dot product of two vectors A and B = 75.2.

 2- The vector product of two vectors A and B = 43.6 n.

Q.1:Define:

1. Measurement.                                        2- Fundamental physical quantities.

3. Derived physical quantities.                 4- Standard meter.

5- Standard kilogram.                                  6- Standard second.

7- Dimensional formula.                              8- Absolute error.

9- Relative error.                                           10- Scalar quantities.

11- Vector quantities.                                    12- Distance.

13- Displacement.                                        14- Resultant force

2. Mention one harm of nano technology in the following fields:

   1. Medical: nano particles have a negative effects on organs.

   2. Environmental: Pollution of water and air by nano particles.

   3. Social: un even distribution of resources.

2. Mention one application of nanotechnology in the following fields:

   1. Medical: Early diagnosing of diseases.

   2. Agricultural: Production of pesticides.

   3. Energy: Production of nano silicon and hydrogen fuel cells.

   4. Industerial: Production of nano wrapping substance.

   5. Communication: Production of wirless nano devices.

   6. Environmental: Production of nano filter for purifying air air and water.

5) a- What is the importance of measurement in chemistry:

1. Gaining information.

2. Monitoring and protection.

3. Evaluation and suggestion.

3. Write the scientific term:

1. An organized structure of knowledge includes facts, concepts, principle and theories. (Science)

2. The chemical substance with healing properties. ( medicines)

3. Deals with the treatment of matter on the nano scale.( nano technology)

4. Deals with the chemical applications of the nano substances.( nano chemistry)

5. Equals one of a billion of meter. ( nano meter)

6. Substances in which one or more of their dimension is between(  1– 100nm).       ( nano substance)

7. The volume of the substance in which the nano properties appears.      (critical nano volume)

8. The properties of the substance that depend on the nano volume of the substance. ( volume dependent properties)

9. A place at which the chemical experiments are carried out.   (chemistry laboratory)

10. The comparison of an known quantity with a known one.  ( measurement)