Outer metal foil coating and parachute: what they have in common

1. Step 1. Outer metal foil coating — is part of — Leyden jar. Foil on the outside of the jar.
2. Step 2. Leyden jar — uses — Electrostatic machine. Charged by the machine.
3. Step 3. Electrostatic machine — uses — Friction. Friction.
4. Step 4. Friction — is used in — Rope. Twisted fibres hold each other by friction.
5. Step 5. Rope — is part of — Parachute. The lines are ropes.

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