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# AP State 9th Class Physical Science New Solutions Best Answers

AP State 9th Class Physical Science Textbook Notes and Answers. Here we are submitting complete notes of Class IX physics notes and solutions. We hope this will clear all doubts. If you suggest  any suggest feel free to send us your suggestions. Class 9 physics, Class IX physics, Class IX physics notes, Class IX physics solutions, Class 9 physics solutions. 9th class physics textbook state syllabus pdf download ,ap 9th class chemistry textbook pdf.

## AP State 9th Class Physical Science Textbook Notes

Class 9 physics, Class IX physics, Class IX physics notes, Class IX physics solutions, Class 9 physics solutions. 9th class physics textbook state syllabus pdf download ,ap 9th class chemistry textbook pdf, AP State 9th Class Physical Science

Unit 1 Motion

Unit 2 Laws of Motion

Unit 3 Is Matter Pure?

Unit 4 Atoms and Molecules

Unit 5 What is inside the Atom?

Unit 6 Chemical Reactions and Equations

Unit 7 Reflection of Light at Curved Surfaces

Unit 8 Gravitation

Unit 9 Floating Bodies

Unit 10 Work and Energy

Unit 11 Sound

Unit 12 Units and Graphs

### AP State 9th Class Physical Science

9th class physics textbook state syllabus pdf download ,ap 9th class chemistry textbook pdf, Class 9 physics, Class IX physics, Class IX physics notes, Class IX physics solutions, Class 9 physics solutions. 9th class physics textbook state syllabus pdf download ,ap 9th class chemistry textbook pdf, AP State 9th Class Physical Science

Motion is relative. Motion of an object depends on the observer.
 Distance is the path length traversed and displacement is the shortest distance in a
specified direction.
 Average speed is distance covered per unit time and average velocity is displacement in
a specified direction per unit time.
 Speed at an instant is instantaneous speed which gives the idea of how fast the position
of the body changes.
 Velocity is speed in specified direction.
 The motion is uniform when the velocity is constant.
 A body has acceleration when the velocity of the body changes.
 Acceleration is the rate of change of velocity.
 The motion is said to be uniform accelerated motion if acceleration is constant.

## AP State 9th Class Physical Science Textbook Notes

Class 9 physics, Class IX physics, Class IX physics notes, Class IX physics solutions, Class 9 physics solutions. 9th class physics textbook state syllabus pdf download ,ap 9th class chemistry textbook pdf, AP State 9th Class Physical Science

First Law of Motion: A body continues its state of rest or of
uniform motion unless a net force acts on it.
 The natural tendency of objects to resist a change in their state of rest or of uniform
motion is called inertia.
 The mass of an object is a measure of inertia. SI unit of mass is Kilogram (kg).
 Second Law of Motion: The rate of change of momentum of a body is directly
proportional to the net force acting on it and it takes place in the direction of net force.
 Linear momentum of a body is the product of its mass and velocity. p = mv
 One ‘Newton’ is the force which when acting on a body of mass 1 kg, produces an
acceleration of 1 m/s2
1 newton (N) = 1kg x 1 ms-2
 Third Law of Motion: If one object exerts a force on other object, the second object
exerts a force on the first one with equal magnitude but in opposite direction.
 In an isolated system, that means where there is no net external force, the total momentum
is conserved

## AP State 9th Class Physical Science Textbook Notes

Class 9 physics, Class IX physics, Class IX physics notes, Class IX physics solutions, Class 9 physics solutions. 9th class physics textbook state syllabus pdf download ,ap 9th class chemistry textbook pdf, AP State 9th Class Physical Science

A mixture contains more than one substance (element and/or compound) mixed in
any proportion.
 Mixtures can be separated into pure substances using appropriate separation
techniques.
 A solution is a homogeneous mixture of two or more substances. The major
component of a solution is called the solvent, and the minor, the solute.
 The concentration of a solution is the amount of solute in grams present per 100 ml

## AP State 9th Class Physical Science Textbook Notes

or per 100 g of the solution.

 Materials that are insoluble in a solvent and have particles that are visible to naked
eye, is called a suspension. A suspension is a heterogeneous mixture.
 Colloids are heterogeneous mixtures in which the particle size is too small to be
seen with the naked eye, but is big enough to scatter light. Colloids are useful in
industry and daily life. The colloid has the dispersed phase and the medium in which
they are distributed is called the dispersion medium.
 Pure substances can be elements or compounds. An element is a form of matter that
cannot be broken down by chemical reactions into simpler substances. A compound
is a substance composed of two or more different types of elements, chemically
combined in a fixed proportion.
 Properties of a compound are different from its constituent elements, whereas a
mixture shows the properties of its constituting elements or compounds

## AP State 9th Class Physical Science Textbook Notes

Class 9 physics, Class IX physics, Class IX physics notes, Class IX physics solutions, Class 9 physics solutions. 9th class physics textbook state syllabus pdf download ,ap 9th class chemistry textbook pdf