A well maintained ski should last forever. That means keeping it dry, waxed, not allowing the edges to rust, etc. However, just because a ski lasts forever doesn't mean you should continue to ski on it forever. Ski construction continues to advance, and skis from 20 years ago, while still usable, are techically inferior. Much like a car from the 1950s will still work and indeed has some charm, old skis will work fine. However, you will be missing out on the technological advances in the past including differently shaped skis, vibration dampening technology, materials tech making the skis lighter and stronger, etc.
Five years.
Rock and roll music will last forever, well if its also created with future people, and they should carry on this generation as long as this world is around
Most pianos can last for close to 15 seconds, assuming the strings are not muted in any way.
A honeymoon can last however long you want it too. Usually 2 weeks to a month. Or until you get bored of having non-stop romance, makeout sessions, and sex.
As long as there are no leaks and it never gets low of lubricant modern differentials should last the life of the vehicle. For even more insurance against failure have the lubricant changed at 100,000 miles and install synthetic lube.
Because if skis were short and round, they would be called "bicycles".
Long skis, a surfboard, ...
Skis for jumping are longer and wider for more air resistence, and skis for racing are long and have slick surfaces and have sharp edges for going faster.
That depends a bit. Normal classic skis should be about 6'9. If you go skating they should be 6'5.
You should get new skis when your side wall is shot... When your base is torn up beyond repair... If your skis in in two pieces... If your technology is outdated.
It depends, if you are a real beginner the skis should be about the height chin to lips but if you are a very very very good racer it can be a few cenimeters taller than you. For the average person skis should be between your nose and eyes.
Antarctica should last as long as the earth lasts.
Should last about 30 minutez
as long as it is not shallow water.
Skis
M
Normal classic skis should be about 25 cm higher than your body height.