One of them placed at the dome of the Pantheon was used to demonstrate the rotation of the Earth by Foucault.
A team led by Nevil Maskelyne used one of these objects to calculate the density of the Earth. These objects were once used to calculate the momentum of a speeding bullet. The differential equation "d squared theta d t squared equals negative g over L sine theta" describes these objects; that equation is then solved by assuming sine theta equals (*) theta. One of them placed at the dome of the Pantheon was used to demonstrate the rotation of the Earth by Foucault. Their periods are independent of mass. For 10 points, name these simple harmonic oscillators which consist of a bob on a string, used in grandfather clocks.
A team led by Nevil Maskelyne used one of these objects to calculate the density of the Earth.
pendulums [or pendula; or ballistic pendulum; or Foucault’s pendulum]