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List of different farming   revolution. 1. Green revolution  -  food grain production                                                        2.  White revolution -        milk  production . 3. Blue revolution     -      fish   production . 4. Brown revolution  -  fertilizer  production.   5. Silver revolution-        Egg  production. 6. Yellow revolution -    oilseeds production  7. Black revolution -   petroleum   production. 8. Red revolution -  tomatoes and  meat                                                          ...

Why curing is required in construction.                         Curing  Curing is the process of maintaining adequate moisture, temperature, and time after concrete is placed so it can properly gain strength and durability . Here’s why it’s important: Proper hydration of cement Cement reacts with water (hydration). Without enough moisture, this reaction stops early → weak concrete. Increases strength Well-cured concrete becomes much stronger over time. Poor curing can reduce strength significantly. Prevents cracks Rapid drying causes shrinkage cracks. Curing keeps the surface moist and reduces cracking. Improves durability Proper curing makes concrete more resistant to weathering, chemicals, and wear. Reduces permeability It makes concrete denser, so less water and harmful substances can enter. Types of curing There are several methods used depending on site conditions: 1. Water cur...

Difference between metal and non metal. 1. Physical State Metals: Mostly solid at room temperature (except mercury). Non-metals: Can be solid, liquid (bromine), or gas (oxygen, nitrogen). 2. Appearance Metals: Shiny (lustrous surface). Non-metals: Dull (non-lustrous). 3. Electrical Conductivity Metals: Good conductors of electricity. Non-metals: Poor conductors (except graphite). 4. Thermal Conductivity Metals: Good conductors of heat. Non-metals: Poor conductors of heat. 5. Malleability Metals: Malleable (can be beaten into thin sheets). Non-metals: Brittle (break easily when hammered). 6. Ductility Metals: Ductile (can be drawn into wires). Non-metals: Non-ductile. 7. Density Metals: Generally high density. Non-metals: Generally low density. 8. Melting and Boiling Points Metals: High melting and boiling points. Non-metals: Low melting and boiling points (generally). 9. Chemical Behavior (Electron Transf...

। Geographical Condition of America (United States) > 1. Basic Political & General Information Official Name:  United States of America Capital:   Washington, D.C. Number of States:  50 states Currency:  US Dollar (USD) National Language:  No official federal language; English is most widely spoken Other Languages:  Spanish, Chinese, Tagalog, French, German, etc. 2. Location and Boundaries The  United States  is located in  North America . Geographical Position Latitudes: 24°N to 49°N Longitudes: 66°W to 125°W Borders North:  Canada South:  Mexico East:   Atlantic Ocean West:   Pacific Ocean Southeast:   Gulf of Mexico Northwest (Alaska):   Arctic Ocean 3. Area and Size Total Area:  9,833,520 sq km Land Area:  9,147,420 sq km Water Area:  685,100 sq km It is the  3rd largest country  in the world (after Russia and Canada). 4. Physical Features & Relief The USA has very diverse...