Question

transistors are an essential part of many electronic devices. the length of a specific transistor is approximately 7 nanometers. this is equal to 7 × 10^(-9) meters. what is 7 × 10^(-9) written in standard form? type the number in the box.

Explanation:

Step1: Recall negative - exponent rule

A number in scientific notation \(a\times10^{-n}\) (where \(1\leqslant a<10\) and \(n\) is a positive integer) can be written in standard form by moving the decimal point \(n\) places to the left. For \(7\times 10^{-9}\), \(a = 7\) and \(n=9\).

Step2: Move the decimal point

Starting with 7, move the decimal point 9 places to the left. Since 7 is a whole - number, we can think of it as 7.0. Moving the decimal point 9 places to the left gives 0.000000007.

Answer:

0.000000007