SPM Physics: Unit Conversion
In responding to unit conversion questions posted by nina in the chat box, my advice is u need to polish your maths basic skills such as conversion & standard form. But in physics,..by now u shud already memorised the power of 10 for prefix like Mega, Giga, kilo, micro & etc. 2. Lets change the unit from km/hr to m/s 7200 kmhr-2 = 7200 km / hr2 = 7200 x 103 m -------- ---- ( 60 x 60)2 s2 = 5.6 x 10 -1 ms-2 On next example i'll show u step by step how unit m3 is changed to cm3 4. 125 cm3, lets change the unit to m3 125 cm3 = 125( 1cm x 1cm x 1cm ), now we wanna change the unit cm to m, coz prefix centi (c) means, c=10-2,so we subst symbol c with 10-2 = 125( 10-2m x 10-2m x 10-2m) = 125( 10-2 x 10-2x 10-2) (m)3 see, the unit now changed to metre cube :) = 125(10-2) m3 =125 x 10-6 m3 We can also rewrite it in standard form ,1.25 x 10-4 m3 If u still unclear with this conversion problems, u can email me at fizbro@gmail.com
For example:
Mega = M = 106
kilo = k = 103
Here some working examples of unit Conversion :
1. 5 kg = 5 (k)g
= 5 (103 )g
= 5 x 103 g
( coz k is the prefix for 103, so just substitute the value of k with 103)
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Physics Study Tips
2010 Physics Trial Paper
2009 Physics Trial Paper
1. Perlis 2009 [Marking scheme]
2. SBP2009 / P1 / P2 / P3 /Marking Scheme (credit to cikgu suriati)
3. Sabah 2009
4.Johor 2009
5. Pahang { P1 } {P2} {P3}
6. Kelantan 2009
7. Terengganu 2009
8. Selangor [ P2 ] [ P3 ] [ Skema ]
9. Negeri 9 [ P2 ] [ P3 ] [ Skema ]
10. Kedah [ P1 ] [P2 ] [ P3 ] [ SKEMA ]
11. MRSM [ P1 ] [ P2 ] [ P3 ]
12. Perak [ P2 ] [ Skema ]
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