Well Braking It Any Ways

A BRIEF HISTORY OF THE SPEED

OF SOUND

The speed of sound is the distance travelled during a unit of time by a sound wave propagating through

an elastic medium. In dry air at 20 C (68 F), the speed of sound is 343.2 metres per second

(1,126 ft/s). This is 1,234 kilometres per hour (767 mph), or about a kilometre in three seconds or a

mile in five seconds.

1500s : Leonardo DaVinci discovered the speed of sound

1640s : Marin Mersenne refined the speed of sound

Late 1600s : Robert Boyle and Sir Isaac Newton created laws

SPEED OF SOUND WAS DEFINED

German V-2 ballistic missile on October 3, 1942

FIRST BROKE THE SPEED OF

SOUND WITH

14 October 1947 : Charles "Chuck" Yeager was the first person to surpass the

speed of sound

AIRCRAFT THAT OFFICIALLY

BROKE THE SOUND BARRIER

May 18, 1953 : Jackie Cochran was the first women to surpass the speed of sound

January 21, 1976 : Passenger Supersonic flight became reality with the

Concorde.

PASSENGER SUPER SONIC

October 14, 1997 : Felix Baumgartner became the first Human projectile to

exceed the sound barrier.

SUPERSONIC HUMAN

PROJECTILE

On October 15, 1997 : Andy Green was the first surpasses the sound barrier on land

BRITTEN BEATS US TO THE LAND

SPEED RECORD