Einstein's energy mass relation

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SUMMARY

Einstein's energy mass relation, expressed as E = mc², establishes that the unit for energy is Joules (J), which corresponds to mass measured in kilograms (kg). The discussion confirms that the correct unit for mass in this equation is indeed kilograms, as indicated by the standard practice in physics. The SI unit for Joules is defined as 1 kg·m²/s², reinforcing the necessity of using kilograms for mass in this context.

PREREQUISITES
  • Understanding of Einstein's mass-energy equivalence
  • Familiarity with SI units and their conversions
  • Basic knowledge of physics equations
  • Concept of energy measurement in Joules
NEXT STEPS
  • Study the derivation of E = mc² in detail
  • Explore the implications of mass-energy equivalence in modern physics
  • Learn about the applications of Joules in various physical contexts
  • Investigate other fundamental physics equations and their units
USEFUL FOR

Students of physics, educators teaching energy concepts, and anyone interested in the foundational principles of mass-energy equivalence.

Hannah1
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Homework Statement


In Einstein's energy mass relation, the unit for the energy released is Joules, this means that the unit for the mass must be

a. g
b. kg
c. it could be either grams or kilograms
d. Newtons


Homework Equations


E = mc2


The Attempt at a Solution


I believe the answer is B. because kg tend to be the standard for equations I've been working on lately.

Am I correct??
 
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Hannah1 said:

Homework Statement


In Einstein's energy mass relation, the unit for the energy released is Joules, this means that the unit for the mass must be

a. g
b. kg
c. it could be either grams or kilograms
d. Newtons


Homework Equations


E = mc2


The Attempt at a Solution


I believe the answer is B. because kg tend to be the standard for equations I've been working on lately.

Am I correct??
What is a Joule in SI units?
 
CAF123 said:
What is a Joule in SI units?

1 J in SI base units is equal to 1 kg·m2/s2.

The answer was, in fact, B. kg. :smile:
 

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