Earth's rotation Foucault in 1851, which consisted of a lead-filled brass sphere suspended from the top of the Panthéon in Paris. Because of the Earth's rotation under the swinging pendulum, the pendulum's plane of oscillation appears to rotate at a rate depending on latitude. At the latitude of Paris the predicted and observed shift was about clockwise per hour. Foucault pendulums now swing in museums around the world. Earth's rotation period relative to the Sun (solar noon to solar noon) is its "true solar day" or "apparent solar day". It depends on the Earth's orbital motion and is thus affected by changes
Which? shops selling hearing aids and an investigation into electronics shop staffs' knowledge of the products that they sell. Other publications include "Which? Travel", "Which? Car", "Which? Money", "Which? Computing" and "Which? Gardening". The Consumer's Association has experienced sharply increased income in recent years as its trading subsidiaries have expanded their activities. Which? regularly briefs and lobbies MPs, Peers, AMs, MLAs, MSPs and MEPs on national, European and international consumer issues. For example, Which? successfully lobbied to put an end to the '65-day rule' that allowed energy companies to wait 65 days before informing their customers of a price change. Following