Tools and measurement
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This document discusses tools and units for measuring various physical properties including volume, mass, length, force, temperature, time, area, and volume. It lists common tools used to measure each property and their standard metric units. The document also introduces the International System of Units (SI) as the global standard for measurement and explains that density is calculated by dividing an object's mass by its volume rather than being directly measured.
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The Nature of Science and Technology Chapter 2
This document discusses the International System of Units (SI) which is the standard system used by scientists for measurement. It describes the SI base units for length (meter), mass (kilogram), time (second), temperature (Kelvin), and other derived units. The key concepts covered include the metric system, SI units, and how conversion factors allow scientists to compare data internationally. Measurement tools are also described for different quantities like rulers for length and balances for mass.
05 measurement
This document discusses measurement systems and units. It provides details on:
- The English and International (SI) systems of measurement, including their base units and prefixes. The English system uses arbitrary objects while SI uses multiples of ten.
- Conversions within and between the two systems. SI is easier for conversions while English uses arbitrary units like inches and pounds.
- Temperature scales including Fahrenheit, Celsius, and Kelvin. It provides the definitions and formulas for converting between the scales.
- Proper reporting of measurements, which requires providing both the measured quantity and the correct unit with the appropriate number of significant figures.
3-measurement-161127184347.pdf
This document discusses various concepts related to measurement in physics. It defines measurement and physical quantities, and categorizes quantities as fundamental or derived. It describes common international systems of units like SI, CGS and MKS. It provides definitions and characteristics of fundamental SI units like metre, kilogram and second. It also discusses derived units, unit prefixes, rules for writing units and some practical units used in different contexts. Finally, it touches upon dimensions of physical quantities, use of dimensions, least count of instruments and accuracy vs precision of measurements.
Units and Measurement
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3-measurement-161127184347.docx
This document discusses various concepts related to measurement in physics. It defines measurement and physical quantities, and categorizes quantities as fundamental or derived. It explains systems of units like CGS, MKS and SI units. It describes the fundamental SI units for length, mass, time, temperature etc. and supplementary units. It discusses units, prefixes, dimensions of quantities, accuracy, precision, significant figures and rounding off measurements. It also provides examples of practical units used to measure different physical properties at various scales.
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Physical quantities refer to measurable features of objects and can be described by their numerical value and unit of measurement. The International System of Units (SI) provides standardized base units for common physical quantities like mass, length, and time, as well as derived units for other quantities like velocity, force, and energy. Quantities can be either scalar, having only magnitude, or vector, having both magnitude and direction. Motion can be described by quantities like position, velocity, and acceleration, and forces cause acceleration according to Newton's laws of motion. Different forms of energy, like kinetic, potential, chemical, and nuclear, can be converted between one another but the total quantity is conserved according to the law of conservation of energy. Nuclear reactions
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This document discusses measurement and the International System of Units (SI). It defines measurement as quantifying physical properties like length, mass, time, and temperature through numbers. Experiments require measurement to verify physical laws. The SI system standardizes units internationally and defines seven fundamental units - the meter, kilogram, second, kelvin, ampere, candela, and mole. It also outlines two supplementary units and rules for writing SI units.
Physical science unit two measurement
1. This document provides an overview of key concepts in physical science measurements including the International System of Units (SI), units of measurement, prefixes, and measurement techniques.
2. The SI system establishes standard units for measuring common physical properties including the meter for length, kilogram for mass, second for time, kelvin for temperature, ampere for electric current, mole for amount of substance, and candela for luminous intensity.
3. Proper measurement requires selecting the appropriate unit and precision based on the quantity and tool. Data is organized and compared using tables, graphs, and applying statistical concepts like mean and percent error.
measurements
Standards of measurement require agreed upon units for comparison. The International System of Units (SI) is the standard system used by most nations, with base units for length, mass, time, and other quantities. SI units include the meter for length, kilogram for mass, second for time, and kelvin for temperature. The appropriate unit depends on the size of the item measured, with smaller objects often measured in centimeters, grams or other decimal units.
Chapter 1 - Unit s and Measurement.pptx
MAHARASHTRA STATE BOARD
CLASS XI
PHYSICS
CHAPTER 1
UNITS AND MEASUREMENT
Introduction
The international system of
units
Measurement of length
Measurement of mass
Measurement of time
Accuracy, precision of
instruments and errors in
measurement
Significant figures
Dimensions of physical
quantities
Dimensional formulae and
dimensional equations
Dimensional analysis and its
applications
1.UNITS AND MEASUREMENTS_S_KATARIA.pptx
he SI comprises a coherent system of units of measurement starting with seven base units, which are the second (symbol s, the unit of time), metre (m, length), kilogram (kg, mass), ampere (A, electric current), kelvin (K, thermodynamic temperature), mole (mol, amount of substance), and candela (cd, luminous intensity) ...
Pengukuran
This document discusses various concepts related to measurement in physics. It defines measurement and physical quantities, and categorizes quantities as fundamental or derived. It explains systems of units like SI, CGS and MKS. It describes units, prefixes and rules for writing units. It also discusses instruments and their least count, accuracy and precision of measurements, significant figures and rounding off numbers.
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This document discusses various concepts related to measurement in physics. It defines measurement and physical quantities, and categorizes quantities as fundamental or derived. It describes common units of measurement like meters, kilograms, seconds that make up the International System of Units (SI). The document outlines characteristics of good units and systems like CGS, MKS and SI. It provides definitions, rules and examples for writing units. It also discusses prefixes, dimensions, accuracy, precision and significant figures in measurements.
International system-units (Science 6)
Here are the units and quantities from Table 7.1 on page 208:
Meter - Length
Kilogram - Mass
Second - Time
Ampere - Electric Current
Kelvin - Thermodynamic Temperature
Mole - Amount of Substance
Candela - Luminous Intensity
ScannerGo_1665225858109.pptx
This document discusses various concepts related to measurement in physics. It defines measurement and physical quantities, and categorizes quantities as fundamental or derived. It introduces various systems of units like SI, CGS, MKS etc. and their fundamental units. It describes units, prefixes and rules for writing units. It also discusses instruments and their least count, accuracy, precision and significant figures in measurements. Finally, it covers rounding off numbers and applying significant figures in calculations.
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This document discusses key concepts for measuring like a scientist using the metric system. It defines important terms like unit, volume, mass, and density. It explains that the metric system is used by most countries and scientists as it is based on units of 10 for standardized measurements. The goal is to learn how to measure the volume of regular and irregular objects, as well as mass, in order to calculate density using the formula: Density = Mass / Volume.
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Tools and measurement
- 1. Chap 1 Sec 4 Tools and Measurement
- 2. Tools • Volume – the amount of space something occupies – Graduated Cylinder, meter stick – Units: L (liquid), cubed (solid) • Mass – The amount of matter that something is made of – triple beam balance – Units: g (gram) • Length – Measure of distance from one point to another – meter stick – Unit: m (meter) • Force – spring scale – Units: N (Newton)
- 3. • Temperature – The measure of how hot or cold something specifically: the average kinetic energy of the objects particles – thermometer – Units: K (Kelvin) we use °C (Celsius) • Time – stopwatch – Units: sec (seconds)
- 4. SI – International System • SI: International system (metric) – used globally as a standard of measurement and units so that info can be shared accurately • Based on 10, making conversion of units easier • We do not measure in standard – EVER!!
- 5. Area • Measure of the surface of an object • Formula: A=lxw • all answers must be squared units • m2 , cm2 , km2
- 6. Volume • Formula: V=lxwxh for a solid that you can physically measure • Units: cubed (for a solid) m3 ,cm3 • OR: water displacement, object is placed in water and the ending value is subtracted starting value • Measured by displacement Formula V = V2 – V1 – Units: mL (mL is never cubed) • 1 mL=1cm3 • Official units = L – liter
- 7. Density • Amount of matter in a given volume Formula: D=m/v • Units: • measured with water displacement – g/mL • Physically measured (solid) – g/cm3 • Density can not be measured directly, you must know (find) the mass and the volume to calculate