Try the others now and post what you get!
Express the following physical quantities using prefix notation and numbers between 1 and 999?
.........-5
4.8 x10 V
.........-7
6.3 x 10 W
..........4
8.2 x 10 N
.........-10
1.6 x 10 A
..........10
3.3 x 10 Hz
..........-7
5.6 x 10 m
Notice that the example I posted bears the power of -3 and not -5 in your question, okay?
0.63 uW is not good. It's below 1. You need to take the next smallest prefix, that is nano: 630 nW
820 kN is not good either. You made a calculation error somewhere. It should be 82 kN
16 nA is not good. It should be in fact 0.16 nA, which means we need the next smallest prefix, which is the pico )p), giving 160 pA
33 nHz? The power you posted is 10, and not -10. Is that a typo? If it's power 10, the it becomes 33 GHz
56 um is not good. It's in fact 560 nm.
Hm... let me give you this tip.
Let's take a number:
Separate it to the one just below -5, which is -6.
Take -9, which is below -7.