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Protons have mass on Backpacks

A backpack for any occasion. Affords enough space for school books and files, and is the trusty companion you need on holiday or in times of leisure.

Main compartment with double zipper and zipped front pocket
Handy headphone opening for safe transport of an MP3 player or iPod while listening to music
Holding capacity: 15.7 litres)
Fabrics: 100% polyester

Backpack

Product size guide

A - Length in in
B - Width in in

Size	A (in)	B (in)
One Size	14.96	11.02

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Created by AB Design

Protons have mass

Protons have mass

AB Design

Created by AB Design

Great gift idea for scientists for a birthday or for Christmas. Protons have mass? I did not know that they are Catholic.

Tags: birthday, gift idea, Christmas, Catholic, atheist, humourous, religion, geek, physics, science, humour, know, nerd, present, theory

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