Brownian Motion - Steve Mould

What does Brownian motion create a bridge between?

• The atomic world and the macro scale world

• Different types of liquids

• Various scientific disciplines

• The past and the future of science

Who was able to work out how much atoms weigh by observing and measuring Brownian motion?

• Isaac Newton

• Nikola Tesla

• Marie Curie

• Albert Einstein

What was the first method used to observe Brownian motion in the video?

• Particles suspended in a liquid

• Laser light scattering

• A high-speed camera

• A smoke cell kit

What effect is observed when one clear liquid is poured into another and turns cloudy?

• The Einstein effect

• The Tyndall effect

• The Doppler effect

• The Uzo effect

What year did Albert Einstein publish his paper on Brownian motion?

• 1925

• 1915

• 1905

• 1895

What did Jean Perrin calculate using Brownian motion?

• The speed of light

• Avogadro's number

• The gravitational constant

• The charge of an electron

What is the size range of fat globules in milk mentioned as an example of particles exhibiting Brownian motion?

• 5 to 10 microns

• 10 to 20 microns

• About 1 or 2 microns

• Less than 1 micron

What assumption did Einstein make about the movement of molecules and particles?

• They are stationary

• They move faster in solids than in liquids

• They move according to the same principles and rules

• They move in a linear path

What does Avogadro's number tell us?

• The number of atoms in the universe

• The speed of molecules in a gas

• The temperature at which all motion stops

• How many atoms of hydrogen there are in one gram of hydrogen

What unique property of gases is mentioned in relation to Avogadro's number?

• The mass of gas molecules determines their volume

• All gases at the same temperature and pressure contain the same number of molecules

• Gases expand to fill their containers

• Gases have no definite shape or volume