Converting Units: A Beginner's Guide

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Unit conversion, particularly in physics, often requires understanding the specific definitions of units like electronvolts (eV) without relying on joules for explanation. Participants emphasize the importance of attempting a solution before seeking help, as this fosters learning and clarifies misunderstandings. Hints and guidance are offered rather than complete solutions to encourage independent problem-solving. The discussion highlights the relevance of equations in unit conversion processes. Understanding the context and definitions of units is crucial for successful conversions.
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Homework Statement
Suppose that certain food was irradiated with an electron beam of kinetic energy 10 MeV. (a) What is the voltage needed for an 'electron gun' to give this kinetic energy to an electron from rest?
Relevant Equations
E = 10 MeV ---> transform to joule

E = e.U ---> ddp ( voltage)
How can I be doing this conversion, could someone explain to me?
 
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Welcome to Physics Forums :welcome:

We can't provide the full solution for your homework, however we can provide you with hints towards the solution and warn you where you go wrong, provided that you write some attempt for the solution with a post of yours.

You don't have to transform the energy to joules to answer this.

Your second equation is quite relevant. Do you know how the unit of eV is defined? (don't give me a definition through the unit of Joule)
 
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