these are simple question and be brainlist and wrong answer will be reported 1)Why is yawning contagious? 2)Why does lightning happen? 3)How do bicycles work?
Answers
Explanation:
1) why is yawning contagious?
Experts have published research that suggests the human propensity for contagious yawning is triggered automatically by primitive reflexes in the primary motor cortex -- an area of the brain responsible for motor function. Their study is another stage in their research into the underlying biology of neuropsychiatric disorders and their search for new methods of treatment.
latest findings show that our ability to resist yawning when someone else near us yawns is limited. And our urge to yawn is increased if we are instructed to resist yawning. But, no matter how hard we try to stifle a yawn, it might change how we yawn but it won't alter our propensity to yawn. Importantly, they have discovered that the urge to yawn -- our propensity for contagious yawning -- is individual to each one of us.
2) why does lightning happen?
Lightning is an electric current. Within a thundercloud way up in the sky, many small bits of ice (frozen raindrops) bump into each other as they move around in the air. All of those collisions create an electric charge. After a while, the whole cloud fills up with electrical charges.this is how lightning happen.
3) how do bicycles work.?
Bicycles turn energy created by our bodies into kinetic energy. A bicycle can convert up to 90 percent of a person's energy and movement into kinetic energy. This energy is then used to move the bike. The rider's balance and momentum help keep the bike stable while traveling along a path.
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