school melt-down

I am currently in school after 23 years of motherhood ..... I need to be able to convert Weight:
1.) 100kg = ? g :
2.) 23g = ? kg ......

Distance: 1.) 100 cm = ? m :
2.) .0035 m = ? cm :
3.) .008km = ? cm:

Frequency:
1.) 1 Hz = ? kHz :
2.) 30 HZ = MHz :

Time:
1.) us = ? s :
2.) 100 ms + ? s :
3.) .0000035 us = ? s ;

Velocity:
1.) 25 m/s = cm/s :
2.) 25 m/s = ? cm/ms:
3.) 25 mm/us = ? cm/s

.... I am totally lost and am not getting a reply from my Prof. ... can not afford to make a bad grade because of not understanding how to convert things .... can you help? Please !!!

Signed,
Into total melt-down ....... Leeanne Wadkins

.... I am totally lost and am not getting a reply from my Prof. ... can not afford to make a bad grade because of not understanding how to convert things .... can you help? Please !!!

When converting from one SI unit to another (like g and kg, etc), you only need to know the prefixes. They are all described here: http://www.convert-me.com/en/metric_conversions_en.html

You can also use conversion calculators on our site to make most of your conversions. The links to various calculator pages can be found on our site homepage