Who invented 'fountain pen' ?
When two bodies are rubbed against each other beat is produced. Where from the heat energy comes ?
The mechanical work done in rubbing the bodies is transformed into the heat energy,
When two bodies are rubbed, their molecules are set in violent motion. Due to this motion, some of the heat energy of the bodies comes to their surface.
When the two bodies are rubbed, some of the adhesive force between the two bodies is transformed into kinetic energy.
None of these.
Why do tyres have a rippled surface and not a plane surface ?
Because a rippled surface is beautiful to look at.
Because the force of friction is more between a rippled surface and the ground than between a plane surface and the ground.
Because the force of friction is less between a rippled surface and the ground than between a plane surface and the ground.
It is done to reduce the chances of puncturing of the tyre.
Who discovered the Law of Heredity ?
Which of the following was the first one to declare that the earth revolves ?
What is the weight of the earth ?
400 billions tons.
600 billion tons.
800 billion tons.
900 billion tons.
Which of the following is neutral ?
Why a drop of water, put on a. clean glass plate, spreads ?
Because the free surface of water tends to cover the maxiinum possible area.
Because the -viscosity of water is high.
Because the adhesive force between glass and water is greater than the cohesive force of water.
Because the adhesive force between glass and water is less than the cohesive force of water.
What is the average density of earth ?
In how many hours Earth completes, one rotation about its own axis ?
3651 x 24 hrs.
1. World Geography -Test-01
2. World Geography -Test-02
3. World Geography -Test-03
4. Geography of India -Test-01
5. Geography of India -Test-02
6. Geography of India -Test-03
7. Geography of India -Test-04
8. Geography of India -Test-05
9. History of India - Test - 01
10. History of India - Test - 02
11. History of India - Test - 03
12. History of India - Test - 04
13. History of India - Test - 05
14. History of India - Test - 06
15. History of India - Test - 07
Precautions while using Kitchen Equipments
Carrer Success Tips
Benefits of Cayenne
Tips to Remove Pimples on Face
3001 Amazing Facts
Get him involved
Include your man in the planning. And find things he will be interested in - odds are he won't care about what napkin linens you choose, but he might be more interested in the bar set up, the photography and DJ