Common Numerical Values in Science
Common Numerical Values in Science
1. ð= 3.1416 memrizing aid:
2. Velocity of light= 3108 m/s
3. Magnitude of universal gravitational constant = 6.6710-11 Nm2/kg2
4. Acceleration due to gravity on the surface of the earth = 9.8 m/s2
5. Mass of ther earth = 61024 kg
6. Average radius of the earth = 6.4106m
7. 1 H.P. = 746 watt= 0.746 kilowatt
8. Lower fixed point of Celsius Scale = 00C
9. Upper fixed point of celcius scale = 1000C
10. Lower fixed point of Fahrenheit scale = 320F
11. Upper fixed point of Fahrenheit scale = 2120C
12. 1 caalorie = 4.186 Joule
Common Numerical Values in Science
13. Specific heat of water = 4.18103 J/ kg/0C
14. Specific heat of ice = 2.14103 J/ kg/0C
15. Latent heat of fusion of ice = 80 cal/gm=336103 J/ kg
16. Latent heat of vapourisation of water = 540 cal/gm=2268103 J/ kg
17. 1 Light year = 9.46071012 km
18. 1 Parsec = 3.26 Ly
19. Astronomical unit (AU) = 1.496 108 km
20. Astronomical Year = 225 106 km
21. Diameter of the sun = 1.39 106 km
22. Distance of earth from the sun = 150 106 km
23. Distance of the moon from the earth = 3.84 105 km
24. Escape velocity = 11.2 km/s
25. Mass of a hydrogen atom = 1.67 10-27 kg
26. 1 atmospheric presssure ( 1 atmm)
= 1.01325 105 N/m2
=1.01325 105 Pascals
Common Numerical Values in Science
27. At N.T.P., the gramm molecule volume of a gas = 22.4 litres.
28. Avogrdro’s number = 6.00221 1023 per mole.
29. Magic numbers : 2, 8, 8, 18 and 32 numbers
30. Number of periods in Modern Periodic Table = 7
31. Nummber of groups in Modern Periodic Table = 18
32. 1 Angstrom (A0) = 10-8 cm= 10-10 m. 0 0 0
Common Numerical Values in Science
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