Question

Write the number in scientific notation.Mass of a Bacterium: \(0.0000000000000003\) gram

Short answer

The mass of a bacterium expressed in scientific notation is \(3 \times 10^{-17}\) grams.

Step-by-step solution

Identify the number of decimal places

The decimal point needs to be moved 17 places to the right to make the number between 1 and 10. It gives \(3\). So \(n = -17\). The negative sign indicates that the decimal has moved to the right.

Write the number in scientific notation

In scientific notation, the given number is written as \(a \times 10^n\). Substituting the values calculated in step 1, it becomes \(3 \times 10^{-17}\).

Key concepts

Decimal Places

Understanding decimal places is crucial when working with very small or very large numbers, particularly in scientific fields. A decimal place refers to the position of a number in relation to the decimal point. For example, in the number 0.0000000000000003, the digit 3 is located at the 17th decimal place.

To express numbers like these in a more compact form, we adjust the number's decimal place. By moving the decimal point to create a new number between 1 and 10, we prepare it for scientific notation. In this context, moving it 17 places to the right changes the original number into 3, an essential step in converting to scientific notation.

This manipulation makes it easier to handle and convey tiny or massive values efficiently, simplifying numerical operations and comparisons. Keep in mind that the number of decimal places you move defines the exponent used in scientific notation, which we'll look into next.

Exponents

Exponents are a fundamental part of scientific notation, enabling us to express numbers more succinctly. When we talk about exponents, we're referring to the number of times a number is multiplied by itself. In scientific notation, the exponent is linked directly to how many decimal places the point has been moved.

For example, in the task of converting 0.0000000000000003 to scientific notation, moving the decimal 17 places gives us the exponent -17. This is designated with a base of 10, the number raised to the power of the exponent, forming the expression \(10^{-17}\).

A negative exponent indicates a move to the right of the decimal, signifying a very small original number. Conversely, a positive exponent, which would result from a move to the left, indicates a very large number. Mastering exponents is essential when dealing with numbers in scientific notation, as it provides a clear and simple way to work with powers of ten.

Number Representation

Number representation, especially through scientific notation, is a powerful tool in mathematics and science for simplifying calculations with extremely large or tiny figures. Scientific notation is a way of expressing numbers that are too big or too small to be conveniently written in decimal form.

To represent a number in scientific notation, it is written in the format \(a \times 10^n\), where \(a\) is a number between 1 and 10, and \(n\) is an integer that shows how many times to multiply or divide by 10. For example, the mass of a bacterium can be expressed as \(3 \times 10^{-17}\) grams, demonstrating that the original decimal 0.0000000000000003 has been converted to a scaled-down equivalent.

This method of number representation is particularly beneficial in disciplines where precision and clarity are crucial, such as physics, astronomy, and engineering. It allows scientists and mathematicians to handle ranges of values cleanly and accurately without the encumbrance of writing a multitude of zeros.