For a 1'000 m walk even a few minutes are needed. By car at 60 km/h exactly 1 minute is needed.
For CHF 1'000 you get a really good PC in discounter stores.
1'000 Bq is the natural radioactivity in the human body. The value is in average body size approximately 1'400 Bq. The radioactivity comes from the naturally occurring potassium-40.
This time need a commuter on the train or the bus until it is most important in the free newspaper 20 Minuten has read.