Chemistry

Gravitation: Newton's law of gravitation  Gravitation and Integral mass.              Gravity.                                                         

Relative Velocity position time graph of two object with equal to 

Relative Velocity position time graph of two object with equal to 

Mass and Weight  Mass of a substance is the amount of matter present in it while weight is the force exerted by gravity on an object. The mass of a substance is constant whereas its weight may vary from one place to another due to change in gravity. The mass of a substance can be determined to very accurately in the laboratory by using an analytical balance. The SI unit of mass given as in in figure is kilogram however its fraction gram 1 Kg is equal to 1000 gram is used in Laboratories to the smaller amounts of chemicals used in chemical reactions. Analytical balance Volume:   volume has the units of length cube. So in SI system volume has units of M cube. But again in chemistry Laboratories commerce small volumes are used. Hens, volume is often denoted in centimetre cube or decimeter cube units.   Are common unit litre which is not an SI unit is used for measurement of volume of liquids. 1 litre is equal to 1000 ml coma 1000 centimetre cube is equal to 1 decimeter cube In the laborat...

Properties of matter and their measurements The property of matter can be classified into categories physical properties and chemical properties. Physical properties - physical properties are those properties which can be measured or observed without changing the identity or the composition of a substance. Some examples of physical properties are colour, smell, melting point ,boiling point ,density etc.                                Chemical properties- the measurement of chemical properties requires a chemical change to occur. For example chemical properties are characteristic reactions of different substances, these include acidity or basicity, combustibility etc. Many Properties of Matter such as length, area, volume are quantitative in nature full stop any quantitative observation on measurement is represented by a number followed by units in which it is measured. For example length of a room can be represented as 6 metre, here 6 is the number and M denotes metre the unit in which...

Matter Anything which has mass and occupies space is called matter. The matter can exist in three physical States solid , liquid and gas. Solid - solid particles are held very close to each other in an orderly fashion and there is not much freedom of movement. Solids have definite volume and definite shape.                                       Liquid - liquid particles are close to each other but they can move around. Liquids have definite volume but not definite shape. Detect the shape of the container in which they are placed.                                                 Gasses - gases particles are far apart as compared to those present in solid or liquid states and their movement is easy and fast because of such arrangement of particles. Gases have neither definite volume nor definite shape day completely occupy the container in which they are placed.

Importance of chemistry Chemistry is the branch of science that studies the composition properties and integration of matter chemist are interested in knowing how chemical transformation occurs. Chemistry plays an important role in meeting human needs for food health care products and other materials aimed at improving the quality of life. This is exemplified by the largest scale production of variety of fertilizers improved varieties of pesticides and insecticides. Similarly many life saving drugs such as cisplatin and techsol comma are effective in Cancer therapy and a z t used for helping AIDS victims coma have been isolated from plants and animal sources are prepared by synthetic methods.