Lowest Speed Nucleus for Acceleration: 9702 Physics Q40

AI Thread Summary
The discussion revolves around question 40 from the 9702 Physics exam, where the participant initially selected option D, believing that the heaviest nucleus would have the lowest speed. However, this assumption was identified as incorrect. The conversation highlights that when nuclei are accelerated through the same voltage, their kinetic energy can be expressed in relation to their atomic numbers, allowing for a comparison of their speeds. The key takeaway is that the mass of the nucleus does not solely determine its speed when subjected to the same acceleration conditions. Understanding the relationship between kinetic energy and atomic number is crucial for solving this problem correctly.
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Homework Statement



http://www.xtremepapers.com/CIE/International%20A%20And%20AS%20Level/9702%20-%20Physics/9702_s07_qp_1.pdf

question 40

Homework Equations





The Attempt at a Solution


I got D, because the heaviest should have the lowest speed. But I am wrong. dnt know why
 
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mutineer123 said:

Homework Statement



http://www.xtremepapers.com/CIE/International%20A%20And%20AS%20Level/9702%20-%20Physics/9702_s07_qp_1.pdf

question 40

Homework Equations



The Attempt at a Solution


I got D, because the heaviest should have the lowest speed. But I am wrong. dnt know why
How does the force on each nucleus compare ?
 


If they are all accelerated through the same voltage you should be able to get an expression for the kinetic energy they each gain using the atomic number then you should be able to get an expression for each speed
 
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