| Front | state hubble's law |
| Back | v=Ho dfor receeding galaxies only |
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| Tags | Astrophysics PhysicsM5 |
| Front | What is meant by Brownian motion |
| Back | Random movement of visible particles due to bombardment by smaller particles |
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| Tags | PhysicsM5 Thermal |
| Front | define density |
| Back | mass per unit volume |
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| Tags | Forces PhysicsM3 |