there have been at least fifteen deaths at the WelshcavePorth yr Ogof in the last twenty years, all but one in the seven-metre-deep Resurgance Pool?
the unusual configuration of the running track at Mike A. Myers Stadium in Austin, Texas – 84 m straights and 118 m curves – has garnered it a reputation as one of the fastest tracks in the world?
Question 1: In 1791, the ________ selected the meridional definition over the pendular definition because the force of gravityvaries slightly over the surface of the Earth, which affects the period of a pendulum.
Question 5: where λ is the determined wavelength; c is the speed of light in ideal vacuum; n is the ________ of the medium in which the measurement is made; and f is the frequency of the source.
Question 6: 1983 October 21 — The seventeenth CGPM defines the metre as equal to the distance travelled by ________ in vacuum during a time interval of 1⁄299,792,458 of a second.
Question 7: 1790 May 8 — The French National Assembly decides that the length of the new metre would be equal to the length of a ________ with a half-period of one second.