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CoachA measurement includes both a number and a unit to provide a quantitative value and context for what is being measured. The number indicates the amount or quantity being measured, while the unit specifies the scale or magnitude of the measurement. Without both components, the measurement lacks clarity and may be misunderstood or misinterpreted.
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All measurements must consist of?
A unit of measurement, a number indicating the quantity, and a scale or reference to provide context.
What measurement must you make to find density of a sample of matter?
Two measurements are needed - you must find its mass and its volume. Density is mass divided by volume.
If there is a difference between a substance's atomic number and its atomic mass and which measure must be the larger number?
The atomic number represents the number of protons in an atom, while the atomic mass represents the sum of protons and neutrons. Generally, the atomic mass is larger than the atomic number for most elements since it includes both protons and neutrons.
How can the number of significant figures in a measurement be increased without changing the measuring device?
To increase the number of significant figures in a measurement, you can estimate between the smallest markings on the measuring device. For example, if a device measures to the nearest 0.1 unit, you can estimate to the nearest 0.01 unit to increase the number of significant figures.
What conditions are necessary when measuring BMR?
When measuring Basal Metabolic Rate (BMR), it's important to ensure the individual is in a fasting state, both physically and mentally at rest, and has not engaged in any strenuous physical activity prior to the measurement. Additionally, the environment should be thermoneutral to prevent any external factors from influencing the metabolic rate measurement.
