A block with mass ma = 10. 0 kg on a smooth horizontal surface is connected by a thin cord that passes over a pulley to a second block with mass mb = 6. 0 kg which hangs vertically.

Observation and experimentation have led many scientists to accept a theory about the origin of the universe. this theory is called the big bang theory. scientific evidence collected and observed by scientists around the world suggests that the universe is ever expanding from a hot and dense initial state. what makes this a scientific theory? (2 points)