1kg ( ball ) VS 1 kg ( metal sheet )

[tesla2]

THEORY :
James Clerk Maxwell, in 1861–64, published his theory of electromagnetic fields and radiation, which shows that light has momentum and thus can exert pressure on objects.



SI units :
ENERGY/SPACE = [ Joul / cubic meters = Newton *meter / cubic meters = N/m^2 ]

1kg Ball VS 1kg ( 100 m^2 metal sheet )



1kg ( wood ) and 1kg ( steel )
wood is more light so ... has got biger surface !!!

[Manrosin]

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[Rockisx]

I'm not expecting to receive this kind of information. The subject matter is very desirable.