UNITS AND MEASUREMENTS

What is the difference between accuracy and precision in measurement?

• Accuracy and precision are the same thing
• Accuracy refers to how close a measurement is to the true value, while precision refers to how consistent a measurement is
• Accuracy refers to how consistent a measurement is, while precision refers to how close a measurement is to the true value
• Accuracy and precision are irrelevant in measurement

What is the unit for measuring temperature in the scientific context?

• Second
• Kilogram
• Meter
• Kelvin

How is the meter defined in the SI system?

• As the duration of 9,192,631,770 oscillations of radiation emitted by a cesium-133 atom
• As the distance traveled by light in a vacuum during a specific time interval
• As the mass of a specific platinum-iridium alloy cylinder
• Using the triple point of water and absolute zero

What is the basis for measuring time intervals in the SI system?

• The distance traveled by light in a vacuum during a specific time interval
• 9,192,631,770 oscillations of radiation emitted by a cesium-133 atom
• The mass of a specific platinum-iridium alloy cylinder
• The triple point of water and absolute zero

What is the base unit for measuring mass in the SI system?

• Kilogram
• Second
• Meter
• Kelvin

What is the purpose of significant figures in measurements?

• To represent uncertainty in a measurement
• To represent the estimated value of a measurement
• To represent the irrelevant value of a measurement
• To represent the exact value of a measurement

Tags

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What is the International System of Units (SI)?

• A system for measuring mass
• A system for measuring distances, displacements, and sizes
• A globally accepted system for measurement in science
• A system for measuring time intervals

What is the significance of physical quantities in physics?

• They are used to measure electric currents
• They determine the accuracy and precision of measurements
• They provide the foundation for scientific understanding
• They are derived from the International System of Units

Tags

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What is the purpose of the International System of Units (SI)?

• To provide a standardized framework for measuring biological quantities
• To provide a standardized framework for measuring astronomical quantities
• To provide a standardized framework for measuring physical quantities
• To provide a standardized framework for measuring chemical quantities

Which instrument is commonly used to measure length?

• Thermometer
• Ruler
• Stopwatch
• Voltmeter