William Thomson (Lord Kelvin) (1824-1907)

Contributions:

1. Thermodynamics:

• Absolute Temperature Scale (Kelvin Scale):

• Description: He introduced the absolute temperature scale, which is now called the Kelvin scale. It starts at absolute zero, the point where all molecular motion ceases.

• Second Law of Thermodynamics:

• Description: He made significant contributions to the second law of thermodynamics, particularly in defining the concept of absolute zero and understanding the direction of heat transfer.

2. Electromagnetism:

• Description: Thomson worked on the mathematical analysis of electricity and magnetism, which contributed to the later development of Maxwell's equations.

3. Transatlantic Telegraph Cable:

• Description: He played a pivotal role in the laying of the first successful transatlantic telegraph cable. His work on signal transmission and attenuation was critical for this achievement.

4. Kelvin's Circulation Theorem:

• Description: This theorem in fluid dynamics states that the circulation around a closed curve moving with the fluid remains constant over time.

Both Daniel Bernoulli and William Thomson (Lord Kelvin) made ground breaking contributions to physics and mathematics, laying foundational principles that are still widely used today.