Gray Converter
Convert Gray to Joule Kilogram Second and more • 73 conversions
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Unit Explanations
GrayGy
Source UnitThe gray (Gy) is the SI derived unit of absorbed dose of ionizing radiation, defined as the absorption of one joule of radiation energy by one kilogram of matter. It quantifies the amount of energy deposited by radiation in a specified mass of material, which in biological contexts is often human tissue. The gray is crucial in assessing radiation exposure and its potential biological effects, and it serves as a fundamental unit in radiation safety and protection protocols.
Current Use
The gray is widely used in medical fields, particularly in radiation therapy for cancer treatment, where precise dosages are critical for effective treatment while minimizing damage to surrounding healthy tissue. It is also employed in radiological assessments, nuclear power, and safety protocols for radiation workers. Various international organizations, including the International Atomic Energy Agency (IAEA), utilize the gray for consistent communication regarding radiation exposure levels.
Fun Fact
The gray is equivalent to 100 rad, an older unit of absorbed dose.
Joule-Kilogram-SecondJ·kg·s
Target UnitThe joule-kilogram-second (J·kg·s) is a derived unit of measurement that combines three fundamental units: joules (energy), kilograms (mass), and seconds (time). It is utilized primarily in the fields of physics and engineering to quantify energy transfer, work done, or the rate of energy transfer per unit mass over time. This unit can be understood as the energy associated with a mass per second, providing insights into processes such as radiation emissions or energy efficiency in various systems. The joule itself is defined as the energy expended when one newton of force moves an object one meter, making it a critical unit in energy calculations.
Current Use
Today, the joule-kilogram-second is utilized in various scientific and engineering disciplines, particularly in fields involving energy transfer and radiation. It is relevant in nuclear physics, where it aids in quantifying energy release in reactions, and in environmental science, where it assists in evaluating energy efficiency of processes. The unit is also important in biomedical applications, such as understanding radiation doses in medical treatments, allowing for precise calculations that ensure patient safety.
Fun Fact
James Prescott Joule's experiments led to the first law of thermodynamics, linking heat and work.
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📐Conversion Formula
= × 1.00000How to Convert
To convert to , multiply the value by 1.00000. This conversion factor represents the ratio between these two units.
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💡 Pro Tip: For the reverse conversion ( → ), divide by the conversion factor instead of multiplying.
Gray
radiation • SI Unit
Definition
The gray (Gy) is the SI derived unit of absorbed dose of ionizing radiation, defined as the absorption of one joule of radiation energy by one kilogram of matter. It quantifies the amount of energy deposited by radiation in a specified mass of material, which in biological contexts is often human tissue. The gray is crucial in assessing radiation exposure and its potential biological effects, and it serves as a fundamental unit in radiation safety and protection protocols.
History & Origin
The gray was introduced in 1975 by the International System of Units (SI) as the unit of absorbed dose to provide a standardized measurement for radiation exposure. Its creation was a response to the need for a unified system that could facilitate consistency in scientific research and practical applications in radiology, nuclear medicine, and radiation therapy.
Etymology: The unit is named after the British physicist Louis Harold Gray, who made significant contributions to the field of radiation therapy and the study of radiation's effects on biological tissue.
Current Use
The gray is widely used in medical fields, particularly in radiation therapy for cancer treatment, where precise dosages are critical for effective treatment while minimizing damage to surrounding healthy tissue. It is also employed in radiological assessments, nuclear power, and safety protocols for radiation workers. Various international organizations, including the International Atomic Energy Agency (IAEA), utilize the gray for consistent communication regarding radiation exposure levels.
💡 Fun Facts
- •The gray is equivalent to 100 rad, an older unit of absorbed dose.
- •The gray is used in radiation therapy to ensure that the cancerous tissue receives a lethal dose while surrounding healthy tissue receives a much lower dose.
- •Louis Harold Gray was the first scientist to quantify the effects of radiation on living tissue, leading to advancements in cancer treatment.
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Joule-Kilogram-Second
radiation • Non-SI
Definition
The joule-kilogram-second (J·kg·s) is a derived unit of measurement that combines three fundamental units: joules (energy), kilograms (mass), and seconds (time). It is utilized primarily in the fields of physics and engineering to quantify energy transfer, work done, or the rate of energy transfer per unit mass over time. This unit can be understood as the energy associated with a mass per second, providing insights into processes such as radiation emissions or energy efficiency in various systems. The joule itself is defined as the energy expended when one newton of force moves an object one meter, making it a critical unit in energy calculations.
History & Origin
The concept of energy as a measurable quantity emerged in the late 19th century, largely credited to the work of James Prescott Joule, who established the relationship between mechanical work and heat. The joule was formally defined in 1889 during the 2nd CGPM, following Joule's foundational experiments that linked mechanical energy to heat energy. The integration of mass and time into this framework led to the joule-kilogram-second as a practical unit to assess energy transfer processes in different contexts.
Etymology: The term 'joule' derives from the name of the British physicist James Prescott Joule, while 'kilogram' comes from the French 'kilogramme,' linked to the Greek 'khilo' meaning thousand, and 'gram' meaning weight. 'Second' stems from the Latin 'secunda,' which means 'following,' denoting the second division of an hour.
Current Use
Today, the joule-kilogram-second is utilized in various scientific and engineering disciplines, particularly in fields involving energy transfer and radiation. It is relevant in nuclear physics, where it aids in quantifying energy release in reactions, and in environmental science, where it assists in evaluating energy efficiency of processes. The unit is also important in biomedical applications, such as understanding radiation doses in medical treatments, allowing for precise calculations that ensure patient safety.
💡 Fun Facts
- •James Prescott Joule's experiments led to the first law of thermodynamics, linking heat and work.
- •The joule is equivalent to 0.239 calories, making it a versatile unit in energy discussions.
- •In space, energy transfer rates are significant for understanding cosmic radiation impacts.
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Frequently Asked Questions
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To convert to , multiply your value by 1. For example, 10 equals 10 .
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The formula is: = × 1. This conversion factor is based on international standards.
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