'The toy seen <a href="http://www.j-archive.com/media/2009-01-19_DJ_26.wmv">here</a> is demonstrating the conservation of momentum & of this, formulated by Helmholtz in 1847'
energy
SCIENCE FACT: The toy seen here is demonstrating the conservation of momentum & of this, formulated by Helmholtz in 1847
The toy seen here is demonstrating the conservation of momentum & of this, formulated by Helmholtz in 1847
The toy seen here is demonstrating the conservation of momentum & of this, formulated by Helmholtz in 1847
SCIENCE FACT
energy
SCIENCE FACT