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Heavy Equipment

What are those yellow rectangles between the railway tracks?

NODUM - 2026-04-08

Watercraft

What are those spinning discs on ship windows?

NODUM - 2026-04-07

Things and Clutter

How thick is the ice in an arena ice rink?

NODUM - 2025-02-04

Cars

Should all cars have centerlock wheels? No

NODUM - 2025-02-04

Heavy Equipment

What is that little metal plate flapping on tractor’s exhaust?

NODUM - 2022-10-30

Things and Clutter

Why some pressure gauges are filled with liquid?

NODUM - 2022-10-28

Aviation

Why commercial planes usually fly at 9-13 km altitude?

NODUM - 2022-10-07

Cars

Why side mirrors in the US have a long warning?

NODUM - 2022-10-07

Heavy Equipment

Why grain auger is always on the left side of the...

NODUM - 2022-09-24

Cars

Why speedometers freeze in accidents? Are those readings reliable?

NODUM - 2022-03-29