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Scientific Notation
The document discusses scientific notation, which expresses large numbers as a product of two factors - a number greater than or equal to 1 but less than 10, and a power of 10. It provides examples of writing numbers in scientific notation and standard form, multiplying numbers by powers of 10, and comparing numbers written in scientific notation. The key aspects covered are how to write large numbers as powers of 10 and how to convert between scientific notation and standard form.
IB Chemistry on Uncertainty, significant figures and scientific notation
1. Identify the measurements (numbers with units) in the problem and determine their significant figures.
2. Perform calculations using all digits of measurements but retain the least number of significant figures.
3. Round the final answer to the same number of significant figures as the least precise measurement.
IB Chemistry on Uncertainty calculation and significant figures
1) Significant figures are used to indicate the precision of measurements and calculations. They show the certain digits and one estimated digit.
2) Rules for significant figures must be followed in calculations to properly carry over the level of precision. In addition and subtraction, the last digit retained is determined by the least precise term. In multiplication and division, the answer cannot contain more significant figures than the least accurate number.
3) Measurements are recorded using both significant figures and uncertainty. The uncertainty is based on the precision of the measuring instrument and is carried through calculations following specific rules for how uncertainties add or multiply. This provides a range that the true value can be expected to lie within.
Option C, Solar Energy, Biofuel and Electron Conjugation
The document discusses photosynthesis and biological pigments. It explains that photosynthesis uses chlorophyll, which contains conjugated double bonds, to absorb visible light and use the energy to convert CO2 and H2O into glucose. Biological pigments like carotene and anthocyanin also contain extensive conjugation, which allows them to absorb visible light and appear colored. More conjugation leads to absorption at longer wavelengths and color formation, from UV absorption when conjugation is low to visible light absorption and color when conjugation is high.
IB Chemistry on Uncertainty Calculation and significant figures
This document provides a tutorial on significant figures used in measurements. It discusses how significant figures indicate the degree of precision in a measurement by showing the digits that are certain plus one estimated digit. The number of significant figures should be consistent with the precision of the measuring instrument. Rules for determining significant figures based on the presence of zeros are also covered. The document concludes with explanations of how to apply significant figures to calculations involving addition, subtraction, multiplication and division.
IB Chemistry on Uncertainty, Significant figures and Scientific notation
This document provides a tutorial on significant figures, uncertainty, and scientific notation. It explains that significant figures are used to show the precision of a measurement and include all digits that are known certainly plus one that is estimated. Rules for determining the number of significant figures in measurements taken with different precision equipment are covered. Examples demonstrate how to determine the number of significant figures and express measurements with uncertainty. Scientific notation is also explained as a way to write very large or small numbers in a standardized format.
Presentació pel Museu dels Minerals
Presentacions realitzades pels alumnes de 4t de l'escola Can Misses dins del seu projecte del minerals.
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Scientific Notation
The document discusses scientific notation, which expresses large numbers as a product of two factors - a number greater than or equal to 1 but less than 10, and a power of 10. It provides examples of writing numbers in scientific notation and standard form, multiplying numbers by powers of 10, and comparing numbers written in scientific notation. The key aspects covered are how to write large numbers as powers of 10 and how to convert between scientific notation and standard form.
IB Chemistry on Uncertainty, significant figures and scientific notation
1. Identify the measurements (numbers with units) in the problem and determine their significant figures.
2. Perform calculations using all digits of measurements but retain the least number of significant figures.
3. Round the final answer to the same number of significant figures as the least precise measurement.
IB Chemistry on Uncertainty calculation and significant figures
1) Significant figures are used to indicate the precision of measurements and calculations. They show the certain digits and one estimated digit.
2) Rules for significant figures must be followed in calculations to properly carry over the level of precision. In addition and subtraction, the last digit retained is determined by the least precise term. In multiplication and division, the answer cannot contain more significant figures than the least accurate number.
3) Measurements are recorded using both significant figures and uncertainty. The uncertainty is based on the precision of the measuring instrument and is carried through calculations following specific rules for how uncertainties add or multiply. This provides a range that the true value can be expected to lie within.
Option C, Solar Energy, Biofuel and Electron Conjugation
The document discusses photosynthesis and biological pigments. It explains that photosynthesis uses chlorophyll, which contains conjugated double bonds, to absorb visible light and use the energy to convert CO2 and H2O into glucose. Biological pigments like carotene and anthocyanin also contain extensive conjugation, which allows them to absorb visible light and appear colored. More conjugation leads to absorption at longer wavelengths and color formation, from UV absorption when conjugation is low to visible light absorption and color when conjugation is high.
IB Chemistry on Uncertainty Calculation and significant figures
This document provides a tutorial on significant figures used in measurements. It discusses how significant figures indicate the degree of precision in a measurement by showing the digits that are certain plus one estimated digit. The number of significant figures should be consistent with the precision of the measuring instrument. Rules for determining significant figures based on the presence of zeros are also covered. The document concludes with explanations of how to apply significant figures to calculations involving addition, subtraction, multiplication and division.
IB Chemistry on Uncertainty, Significant figures and Scientific notation
This document provides a tutorial on significant figures, uncertainty, and scientific notation. It explains that significant figures are used to show the precision of a measurement and include all digits that are known certainly plus one that is estimated. Rules for determining the number of significant figures in measurements taken with different precision equipment are covered. Examples demonstrate how to determine the number of significant figures and express measurements with uncertainty. Scientific notation is also explained as a way to write very large or small numbers in a standardized format.
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IB Chemistry on Uncertainty, significant figures and scientific notation
IB Chemistry on Uncertainty, significant figures and scientific notation
IB Chemistry on Uncertainty calculation and significant figures
IB Chemistry on Uncertainty calculation and significant figures
Option C, Solar Energy, Biofuel and Electron Conjugation
Option C, Solar Energy, Biofuel and Electron Conjugation
IB Chemistry on Uncertainty Calculation and significant figures
IB Chemistry on Uncertainty Calculation and significant figures
IB Chemistry on Uncertainty, Significant figures and Scientific notation
IB Chemistry on Uncertainty, Significant figures and Scientific notation
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Presentació pel Museu dels Minerals
Presentacions realitzades pels alumnes de 4t de l'escola Can Misses dins del seu projecte del minerals.