- Chuck Norris (Wikipedia)
Carlos Ray “Chuck” Norris (born March 10, 1940) is an American martial artist and actor. He is a black belt in Tang Soo Do, Brazilian jiu jitsu and judo. After serving in the United States Air Force, Norris won many martial arts championships and later founded his own discipline Chun Kuk Do. Shortly after, in Hollywood, Norris trained celebrities in martial arts. Norris went on to appear in a minor role in the spy film The Wrecking Crew (1969). Friend and fellow martial artist Bruce Lee invited him to play one of the main villains in Way of the Dragon (1972). While Norris continued acting, friend and student Steve McQueen suggested he take it seriously. Norris took the starring role in the action film Breaker! Breaker! (1977), which turned a profit. His second lead Good Guys Wear Black (1978) became a hit, and he soon became a popular action film star.
- Mass (Wikipedia)
Mass is an intrinsic property of a body. It was traditionally believed to be related to the quantity of matter in a body, until the discovery of the atom and particle physics. It was found that different atoms and different elementary particles, theoretically with the same amount of matter, have nonetheless different masses. Mass in modern physics has multiple definitions which are conceptually distinct, but physically equivalent. Mass can be experimentally defined as a measure of the body’s inertia, meaning the resistance to acceleration (change of velocity) when a net force is applied. The object’s mass also determines the strength of its gravitational attraction to other bodies.
