Galileo proved the isochronism of a.
pendulum in 1602. He later used his discovery to design a.
clock that used pendulums. While Galileo was looking for a.
job after he left the University of Pisa, 1856, he invented the.
hydrostatic balance. This was a device that found the.
specific gravity of substances by weighing them under water.
This is what gave Galileo his first notice from the public.
Galileo also discovered that Aristotle's belief that objects fall.
at velocities proportional to their weight was wrong. He.
found that all objects fall at the same rate; it is only the.
density of the median they fall through that causes larger.
objects to fall slower. He believed that all objects would fall.
the same rate if they were in a vacuum. It is said Galileo.
showed his students at the University of Pisa his discovery.
by dropping a musket ball and a cannon ball at the same.
time from the Leaning Tower of Pisa. Some scientists in an.
article in New Scientist claim that Galileo was wrong in.
saying that all objects fall at the same rate. They base their.
calculations on the quantum theory. Particles in the objects.
are constantly absorbing and releasing photons; this.
absorbing and releasing changes the total energy that the.
particles carry, which depends on temperature. This then.
changes the inertial mass of the object. From this the.
scientists concluded that heavier and cooler objects will fall.
faster than those objects that are lighter and hotter. Although.
this disproves what Galileo found, Galileo was still fairly.
correct in his findings; the effect these scientists found is very.
small. It is almost impossible to measure the difference in the.
time it takes two objects of different weights to reach the.
ground. ("Galileo Got it Wrong", p. 36.) Galileo also made.
many discoveries while he was teaching at the University of.
Padua. Some of his little inventions were a calculating.
compass, a thermometer, and a pump. One of his bigger.
discoveries was that the path of a projectile was a parabola.