Ch 1 Phy Class 9
Important Easy Notes of Ch 1 Phy Class 9 English Medium written by Professor Mr. Samiullah Suib. These notes are very helpful in the preparation of Physics for students of the 9th class Physics English Medium and these are according to the paper patterns of all KPK Book Boards.
Summary and Contents:
Topics which are discussed in the notes are given below:
- Derivation and meaning of science
- Definition of science and also writes branches of science.
- Definition of matter with examples.
- Definition of volume
- Definition of mass
- Definition of energy
- Write the importance of Physics
- Contribution to Physical Science by Islamic word.
- Famous Pakistani scientists: Mohammad Abdus Salam, Abdul Qadeer Khan.
- Branches of Physics.
- Definition of mechanics with examples.
- Definition of heat and thermodynamics with examples.
- Definition of oscillation and waves with examples.
- Definition of optics with examples.
- Definition of electricity and Magnetism with examples.
- Definition of atomic and nuclear physics with examples.
- Definition of relativity with examples.
- Definition of quantum physics with examples.
- Definition of particle physics with examples.
- Definition of cosmology and astrophysics with examples.
- Definition of bio physics and medical physics with examples.
- Definition of measurement with examples.
- Definition of magnitude with examples.
- Definition of physical quantities with examples and also types of physical quantities.
- Definition of base physical quantities with examples.
- Definition of derived physical quantities with examples.
- Definition of Non physical quantities with examples.
- Definition of System of units and also write the names of various system of units.
- Definition of base units with examples.
- Definition of derived unit with examples.
- Base units for international System of units.
- Application of SI System of units.
- Definition of standard form with mathematical form with examples.
- Steps for converting number to standard form.
- Definition of prefixes also Table of Prefixes.
- Definition of measuring instruments with examples.
- Definition of Metre role with construction.
- Least count of Metre Rule
- Precautions while using Metre rule.
- History and definition of vernier caliper also write its construction.
- Definition of least count of vernier calipers with abbreviation.
- Number of divisions on vernier scale is 10.
- Definition of positive zero error and correction of positive zero error.
- Definition of a screw gauge and write its construction.
- Definition of physical balance with its construction and figure.
- Definition of a stop watch with its type.
- Definition of measuring cylinders, also write its construction and working.
- Numerical of the exercise Ch 1 Phy Class 9.
- The mass of Earth is 5,980,000,000,000,000,000,000,000 kg; write this number in standard form/ Scientific Notation.
- Calculate the number of seconds in weak. Express the number in power of 10 notations.
- Adult housefly ( Musca Domestica ) is having a mass of only about 0.000,0214 kg. Express this number in standard form /scientific notation.
- The smallest bird is the Hummingbird. Males measure only 0.057 m. Convert this number to standard form and write this number in millimeter.
- The distance of from Peshawar to Lahore is 489 km. Convert this distance into millimetres.
- Which of the following is the accurate device for measuring instrument length? (A): A vernier calipers with main scale of 1 mm marking and 50 divisions on the sliding scale. (B): A screw gauge of pitch 1 mm and 25 divisions on the circular scale.
- A breaker contains 200 mL of water, what is the volume of water in cm3 and m3.
- How technology is shaped by physics?
- Physics and Biology are considered different branches of science, how Physics links with biology?
- Why are measurement important?
- Why area is a derived quantity?
- Name any four derived units and write them as their base units?
- Why in Physics we need to write in Scientific notation?
- What is least count? How least count for vernier caliper and Screw gauge are defined?
- How can we find the volume of a small pebble with the help of measuring cylinder?
- Write the number in prefix to power of ten: (a): Mechanical Nano-oscillators can detect a message as small as small as 10^-21kg. (b): The nearest neutron star (a collapsed star made primarily of neutrons) is about 3.00*10^18m away from Earth.
- The speed of light is c= 299,792458 m/s. (a) Write this value in scientific notation. (b) Express the speed of light to (i) 5 significant figures (ii) 3 significant figures.
- Express the following in terms of powers of 10. (i) Nanometer (ii) Megawatt (iii) Gigabytes (iv) picofarad (v) Millimeter.