Understanding Absolute Zero and Its Implications

The video explores the concept of Absolute Zero, a temperature of -273.15°C, which is the lowest possible temperature where all kinetic energy in a substance is drained. Sir William Thomson, known as Lord Kelvin, developed the Kelvin scale to measure this. Despite efforts, reaching Absolute Zero is impossible due to quantum mechanics and Heisenberg's uncertainty principle. However, scientists can get very close, leading to phenomena like superconductivity. The coldest natural place in the universe is the Boomerang Nebula, but the coldest temperatures are achieved in Earth laboratories. The video concludes with a call to engage with SciShow.

Who was responsible for the development of the thermodynamic temperature scale?

• Isaac Newton

• Albert Einstein

• Niels Bohr

• Sir William Thomson, First Baron Kelvin

What is Absolute Zero in degrees Celsius?

• -273.15

• 0

• -100

• 273.15

What is the main reason scientists have not been able to reach Absolute Zero?

• Lack of advanced technology

• Quantum mechanics

• Insufficient funding

• Inaccurate temperature scales

What is the significance of the Kelvin scale?

• It measures the color of light

• It is used to measure the amount of kinetic energy in a material

• It measures the speed of light

• It is used to measure sound intensity

What does Heisenberg's uncertainty principle state?

• Absolute Zero is achievable

• All particles are in constant motion

• The position and momentum of a particle cannot both be known exactly at the same time

• Energy cannot be created or destroyed

Why can't we measure both the position and momentum of a particle at Absolute Zero?

• Due to gravitational forces

• Because of lack of precise instruments

• Due to Heisenberg's uncertainty principle

• Because particles stop moving

What happens to certain substances below about 30 Kelvin?

• They expand rapidly

• They become superconductive

• They freeze completely

• They emit radiation

What practical applications do superconductors have?

• They are used in water purification

• They are used in cooking appliances

• They are used in particle accelerators and MRI machines

• They are used in solar panels

What is the temperature of space due to microwave radiation from the Big Bang?

• 0 Kelvin

• 1 Kelvin

• 2.73 Kelvin

• 5 Kelvin

Where is the coldest natural place in the known universe?

• The South Pole

• Deep space

• The Boomerang Nebula

• The North Pole