Showing posts with label Physics. Show all posts
Showing posts with label Physics. Show all posts

# Chapter : Rest and Motion

Simple pendulum(image source: wikipedia.org)

In our daily life we see many objects that are either in rest position or Motion. eg- moving Trains, car ,cycle, etc and on other hand trees, houses, furnitures, etc are in rest position.

# IMPORTANT SCIENTIFIC INSTRUMENT AND THEIR USES THAT ASK IN EXAMINATION

1. Altimeter :- It measures altitudes and is used in aircrafts.
2. Ammeter :- It measures strength of electric current.
3. Audiometer :- It measures intensity of sound.
4. Barometer :- It measures atmospheric pressure.
5. Binocular :- It is used to view distant objects.
6. Calorimeter :- It measures quantity of heat.

# Physics Lacture series : Units and Measurement

Physical Quantities :- Any quantity which can be measure is called physical quantity. eg- length, mass, time, temperature, etc.
on the basis of units and measurement physical quantities can be divide in
• Fundamental quantities:- The physical quantities which do not depend on the other physical quantities are known as fundamental physical quantities. eg-  length, mass, electric current, time, temperature, etc.
• Derived quantities :-  All the physical quantities which are not the fundamental physical quantities but are derived from it  are known as derived physical quantities. eg- work, force, pressure, area, volume, etc.