# Scientific notation (SI) and engineering notation.

1. Express each of the following numbers in scientific notation.

• 0.00000000356     =
• 934,000,000            =
• 847                            =
• 0.00092                    =
• 3,510,000                  =
2. Express each of the following numbers in engineering notation.

• 0.00000000356   =
• 934,000,000         =
• 847                         =
• 0.00092                 =
• 3,510,000               =
3. Express each of the following numbers using the appropriate SI prefix.

Don't forget to retain the units.

• 0.000047 F             =
• 17500000 Hz          =
• 0.0000000157 A    =
• 6800000 Ω             =
• 0.00425 V               =
4. Convert the following numbers into the SI prefix shown.

• 68000 pF         = μF
• 2.7 M Ω           = kΩ
• 4.24 GHz        = MHz
• 25.67 μF         =mF
• 0.00127 nSec    =pSec

## Conclusion

1. Why is it helpful to use a power-of-ten notation (i.e., scientific or engineering) when expressing very large or very small numbers?

2. In engineering in general, and in electronics specifically, why do we use engineering notation rather than scientific notation?

3. The SI prefix for 10-15 is femto and is abbreviated f. We do not use this prefix in electronics. Why?