Physics Intro

Express .000457 in scientific notation.

• 4.57 x 10^-3

• 4.57 x 10^-4

• 4.57 x 10^-5

• 4.57 x 10^-2

How many significant digits are in the number 0.00076?

• 1 significant digit

• 2 significant digits

• 3 significant digits

• 4 significant digits

Express 8.025 x 10^-8 in standard notation.

• .00000008025

• 0.0000008025

• 0.00000000825

• 0.000000000825

How would you write 0.0005 in scientific notation?

• 5 x 10^-5

• 5 x 10^-4

• 5 x 10^-3

• 5 x 10^-6

What is the significance of trailing zeros in a decimal number?

• They are not significant and can be ignored.

• They indicate the precision of the measurement.

• They are only significant in whole numbers.

• They represent the value of the number in scientific notation.

What is the purpose of using scientific notation?

• To simplify the representation of very large or very small numbers, making calculations easier.

• To convert all numbers into fractions for easier comparison.

• To eliminate the need for decimal points in calculations.

• To provide a standard format for writing all mathematical equations.

What is standard notation?

• A way of writing numbers using digits, as opposed to scientific notation.

• A method of expressing numbers in exponential form.

• A technique for rounding numbers to the nearest whole number.

• A system for writing numbers in words.

How do you determine the number of significant digits in a measurement?

• Count all non-zero digits, any zeros between them, and any trailing zeros in the decimal portion.

• Only count the non-zero digits in the measurement.

• Count all digits including leading zeros and ignore non-zero digits.

• Count only the digits after the decimal point.

How do you express a number in scientific notation if it is greater than 10?

• Move the decimal point to the left until the number is between 1 and 10, and then multiply by 10 raised to the power of the number of places moved.

• Move the decimal point to the right until the number is between 1 and 10, and then multiply by 10 raised to the power of the number of places moved.

• Add 10 to the number and express it as a power of 10.

• Divide the number by 10 and express it as a power of 10.

What is scientific notation?

• A method of expressing numbers using fractions.

• A way of expressing numbers that are too large or too small to be conveniently written in decimal form, using powers of ten.

• A technique for rounding numbers to the nearest whole number.

• A system for categorizing numbers based on their size.