Why does tape ‘Screech’ when you peel it off?
Scientists have been investigating the source of this appalling noise since the 1990s, and have being amazed by the complexity of the phenomenon. Put simply, it’s causes when the tape is peeled off at a speed and angle that causes the glue to intermittently stick then slip, creating jagged, unpleasant sound waves
What is the Earth’s axis tilted?
The Earth, just like all the planets of the Solar System (except Mercury), has a rotation axis that is tilted with respect to its orbit around the Sun. Astronomers propose that this is due to energetic collisions between ‘Planetesimals’. These small bodies eventually coalesced to form the planets, knocking them off the perpendicular orientation they would naturally have. Uranus is one example of a planet that has a very large axial tilt, which may be the result of a series of such collisions.
Why does a banana skin get thinner as it ripens?
Bananas are cultivated form of plantain. In the wild, birds and bats are the main seed dispersers of plantains. While the fruit is developing, it is protected by a thick skin that keeps insects out. As the seeds become ripe, the fruit starts to absorb water from the inside of the skin, which causes the cells of the skin to collapse and lose rigidity. This makes it easier for animals to tear them open and carry off the little seed along with a mouthful of banana.
Do it to understand it.
Seeing a believing.
- Learning while experimenting.