As Level Physics - Physical Quantities and Units

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42 Terms

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Scientific Method

A series of steps followed to solve problems including collecting data, formulating a hypothesis, testing the hypothesis, and stating conclusions.

<p>A series of steps followed to solve problems including collecting data, formulating a hypothesis, testing the hypothesis, and stating conclusions.</p>
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scientific theory

a well-tested concept that explains a wide range of observations

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scientific law

a rule that describes a pattern in nature

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physics

the study of matter and energy and how they interact

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experiment

a scientific procedure undertaken to make a discovery, test a hypothesis, or demonstrate a known fact.

<p>a scientific procedure undertaken to make a discovery, test a hypothesis, or demonstrate a known fact.</p>
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Hypothesis

A testable prediction, often implied by a theory

<p>A testable prediction, often implied by a theory</p>
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Units

standard quantities used to specify measurements

<p>standard quantities used to specify measurements</p>
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Precision

a measure of how close a series of measurements are to one another

<p>a measure of how close a series of measurements are to one another</p>
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Accuracy

how close a measurement is to the true value

<p>how close a measurement is to the true value</p>
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Precision vs. Accuracy

precision is consistency of output whereas accuracy is alignment with the targeted value or goal

<p>precision is consistency of output whereas accuracy is alignment with the targeted value or goal</p>
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error

the difference between the experimental value and the accepted value

<p>the difference between the experimental value and the accepted value</p>
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uncertainty

an estimate of how much a measured or calculated value differs from a true value

<p>an estimate of how much a measured or calculated value differs from a true value</p>
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significant figures

All the digits that can be known precisely in a measurement, plus a last estimated digit

<p>All the digits that can be known precisely in a measurement, plus a last estimated digit</p>
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scientific notation

A method of writing or displaying numbers in terms of a decimal number between 1 and 10 multiplied by a power of 10.

<p>A method of writing or displaying numbers in terms of a decimal number between 1 and 10 multiplied by a power of 10.</p>
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meter (m)

SI base unit of length

<p>SI base unit of length</p>
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Kelvin (K)

SI base unit of temperature

<p>SI base unit of temperature</p>
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second (s)

SI base unit for time

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kilogram (kg)

the SI unit for mass, abbreviated (kg)

<p>the SI unit for mass, abbreviated (kg)</p>
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SI system of measurement

the International System of Units developed by scientists as a worldwide standard of measurement

<p>the International System of Units developed by scientists as a worldwide standard of measurement</p>
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kilo (k)

prefix meaning 1000 (10^3)

<p>prefix meaning 1000 (10^3)</p>
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mega (M)

prefix meaning 1000000 (10^6)

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giga (G)

prefix that is one billion; 10^9

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tera (T)

prefix; 10^12

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deci (d)

prefix; 10^-1

<p>prefix; 10^-1</p>
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centi (c)

prefix; 10^-2

<p>prefix; 10^-2</p>
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milli (m)

prefix; 10^-3

<p>prefix; 10^-3</p>
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micro (μ)

prefix; 10^-6

<p>prefix; 10^-6</p>
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nano (n)

prefix; 10^-9

<p>prefix; 10^-9</p>
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pico (p)

prefix; 10^-12

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candela (cd)

SI base unit of luminous intensity

<p>SI base unit of luminous intensity</p>
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Amperes (A)

a unit of electric current equal to a flow of one coulomb per second.

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moles (mol)

SI unit of measurement represented by "n" for amount of substance

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Newton (N)

SI unit of force

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Pascal (Pa)

SI unit of pressure

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Joules (J)

SI unit for energy

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Watt (W)

SI unit of power

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Hertz (Hz)

cycles or waves per second, unit for the measurement of frequency

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Coulomb (C)

SI unit of electric charge

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Volts (V)

unit for voltage

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Ohms (Ω)

unit for electrical resistance

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Tesla (T)

Unit for the magnitude of a magnetic field

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Farad (F)

The SI unit for capacitance