mass
//mæs//
Translation
mass
Definition
In physics, mass is a fundamental property of matter that quantifies the amount of substance in an object, determining its resistance to acceleration (inertia) and its gravitational attraction. It is typically measured in kilograms or grams and is distinct from weight, which depends on gravity. Mass remains constant regardless of location, making it a key concept in mechanics, thermodynamics, and relativity.
Example
“The mass of the rock was measured as 5 kilograms.”
“An object's mass does not change when it is taken to the Moon.”
“The physicist calculated the mass of the electron with high precision.”
“Inertia is directly proportional to an object's mass.”
“The mass of the gas in the container was determined by weighing it.”
“A balance scale compares the mass of two objects.”
“The mass of the planet affects its gravitational pull.”
“Scientists use mass spectrometry to identify chemical compounds.”
“The mass of the sample was recorded in grams.”
“According to Einstein's equation, energy equals mass times the speed of light squared.”
Synonyms
Other meanings
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