When using a microscope to look at smoke particles in air, Brownian motion is observed…
Physics · IGCSE · Cambridge (CIE) — Thermal physics
When using a microscope to look at smoke particles in air, Brownian motion is observed.
What causes the smoke particles to move at random?
Smoke particles are hit by air particles.
Smoke particles are moved by convection currents in the air.
Smoke particles have different weights and fall at different speeds.
Smoke particles hit the walls of the container.
Answer
(A) Smoke particles are hit by air particles.
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