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Mathematical and physics equations of Albert Einstein and Sir Isaac Newton and other equations on black background.
Imbalance of forces - natural scales of stones ( in imbalance) at the sea to the orange sunset - symbol photo
Structure cell membrane. Abstract molecular structure, golden glow. Biology, physics chemistry background
Doppler effect vector illustration. Labeled educational physical sound and light scheme. Educational explanation why waves frequency changes in motion. Stationary static source and moving difference.
chakra system of human energy fields

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