## DLS 2 years ago How to see the table and use log and anti-log? Someone explain please!

1. DLS

$\LARGE \log(2.23)+\log( 6.022)+{23} + 3\log(3.608)-24$ example^^

2. electrokid

|dw:1366282435383:dw|

3. electrokid

4. DLS

I'm getting.. 0.7797?

5. electrokid

yep

6. DLS

:")

7. DLS

cool! thanks :D

8. electrokid

so, $$=0.3483+0.7797+3(0.5573)-1$$

9. DLS

yes i got that!

10. electrokid

are you doing logs to solve a chemistry multiplication??

11. DLS

yes!

12. electrokid

I see Avogadro's const and and the universal Gas const. :D

13. electrokid

2.23 is the number of moles of the gas?

14. DLS

nah :/ its a random no. :P I was trying this.. $\LARGE \frac{28.88}{2.39 \times 10^{-23}}$ I got.. log(28.88) as 1.4606 log(2.39) as 0.3784 and log(10^-23) as -23 so.. 1.4606-0.3784+23 24.0822?

15. DLS

its incorrect somehow :/

16. DLS

@shubhamsrg tell this one

17. shubhamsrg

this is just log,need to take antilog now -_-

18. DLS

10^24.0822..:/

19. DLS

approximately $\sqrt{\sqrt{10}}$ :P

20. shubhamsrg

10^24 *10^0.0822 hmm

21. DLS

kya?

22. shubhamsrg

see the table you may use either log table or antilog table for that. anyways, approximately,10^0.0822 is close to 10^0.1 i.e. it'll be around 1.2

23. DLS

dhang se antilog lena sikhade bc :/ fir kahani khatam :|

24. shubhamsrg

bc bola na raat me :| log table se sikhaya na kaise dekhte hai antilog

25. DLS

okay..

26. DLS

is their a shortcut to get the cube of a 3x3 matrix i,e A^3?

27. shubhamsrg

please follow the code of conduct of openstudy and post this as a new question

28. shubhamsrg

:D

29. shubhamsrg

itna acha laga ye bolke :')

30. DLS

-_-'

31. DLS

bhak ?

32. shubhamsrg

mujhe nahi pata koi shortcut batayenge aapko @yrelhan4

33. yrelhan4

LOL.

34. DLS

o.O

35. DLS

@electrokid

36. electrokid

you look for the mantissa in the antilogs table the same way as for the logs... but only the mantissa.. not the characteristic.

37. electrokid

then you put the number down and put a decimal the characteristic +1 number of digits from the left

38. DLS

an example ?

39. electrokid

take one

40. electrokid

3.5352

41. electrokid

look for .53 row and column "5" and difference "2"

42. DLS

0.3430 till here

43. DLS

what are we supposed to do with the decimal? and another thing.. is antilog 3.532 same thing as $\large 10^{3.532}$ in this particular case

44. electrokid

no we are not done.. we had to accomodate the characteristic. once you get the 0.3430, from the original number, the characteristic is "3" so, we move the decimal point 4 digits to the right so, antilog of 3.5352 = 3430.0

45. electrokid

if you had 1.5352 its antilog would have been 34.30

46. DLS

I see! awesome thanks!

47. electrokid

yw