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For the metal foil, they tested a variety of metals, but favoured gold because they could make the foil very thin, as gold is the most malleable metal. [15]: 127 As a source of alpha particles, Rutherford's substance of choice was radium, which is thousands of times more radioactive than uranium. [16]
The operation of the diamond anvil cell relies on a simple principle: =, where p is the pressure, F the applied force, and A the area. Typical culet sizes for diamond anvils are 100–250 micrometres (μm), such that a very high pressure is achieved by applying a moderate force on a sample with a small area, rather than applying a large force on a large area.
The experiment was partially funded by the Swiss Government. The SWC experiment consisted of a 1 ft × 4.6 ft (0.30 m × 1.40 m) sheet of ultra-pure aluminum foils (also with platinum metal segments on the last Apollo 16 experiment) erected on the Moon's surface with a telescopic pole.
The balloon was constructed from a 9 μm (0.00035 in)-thick mylar film sandwiched between and bonded with two layers of 4.5 μm (0.00018 in)-thick aluminum foil. [11] It was inflated to a pressure that caused the metal layers of the laminate to plastically deform slightly, while the polymer was still in the elastic range.
Ørsted experiment (1820): Hans Christian Ørsted demonstrates the connection of electricity and magnetism by experiments involving a compass and electric circuits. Discovery of electromagnetic induction (1831): Michael Faraday discovers magnetic induction in an experiment with a closed ring of soft iron, with two windings of wire.
They also made experiments upon varying the distance between the copper plate and the magnet, and varying the diameter and thickness of the copper disk. Experiments were made upon various metals, and the torque was found to vary as the conductivity of the metal as far as the latter could be judged after being rolled into the form of plate. Messrs.
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