Mr Why

Have you ever wondered…

What do a poker’s hand, the model of oligopoly and two prisoners have in common? (5/2/2014) -   Consider this situation. Let’s say we have two people, prisoner A and prisoner B. They have committed some sort of crime, a theft, a heist or whatever. They are detained by the police as prime suspects. They are completely unaware of the fact that evidence against them is very weak which leaves the police … Continue reading What do a poker’s hand, the model of oligopoly and two prisoners have in common?
Car or Goat? The Monty Hall problem (3/29/2014) -  Suppose you’re on a game show, and you’re given the choice of three doors: Behind one door is a car; behind the others, goats. You pick a door, say No. 1, and the host, who knows what’s behind the doors, opens another door, say No. 3, which has a goat. He then says to you, “Do you … Continue reading Car or Goat? The Monty Hall problem
What is the gambler’s fallacy? (2/25/2014) - Imagine you are in a casino at a roulette table waiting to gamble. You have been following the game for a while and you’ve noticed that the last six outcomes were black. Well, it is quite remarkable, isn’t it? The probability to get six outcomes of the same color at the roulette is 1/64, approximately … Continue reading What is the gambler’s fallacy?
Endocrine Disruptors: how we are poisoned by everyday chemicals (2/23/2014) - How many chemicals do we get in touch with every day? Are they safe? In which doses? What kinds of chemicals are they? If you have ever tried to find an answer to the previous questions probably this is the right place to check it out. In order to be as rigorous as possible I … Continue reading Endocrine Disruptors: how we are poisoned by everyday chemicals
How does a photocopier work? (2/4/2014) - We all know the difference between an insulating and a conductor. Despite that there are also materials which, depending on their conditions, may change their main inner characteristics: photoconductors, for example, are insulating substances which, after absorbing light, turn into conductors. This feature is exploited by a procedure known as xerography, which is at the … Continue reading How does a photocopier work?
Why does an airbag inflate? (2/3/2014) - For years, seat belts have represented the unique real safety device in our cars. Despite its not being immediately accepted, eventually the seat belt demonstrated all its efficiency. The same happened to the airbag, whose concept has been around for many years. Its invention goes back to 1952, by John W. Hetrick who submitted the … Continue reading Why does an airbag inflate?
Why does Aurora Borealis occur? (1/15/2014) - One of the most spectacular phenomena in nature is without doubt the amazing games of light, shades and colors called Aurora Borealis and Australis, depending on which of the two poles it is perceived at. Those who live at the extreme north and south of Earth might at times experience this colored spectacular lights shimmering … Continue reading Why does Aurora Borealis occur?
Why do we slide on ice? (1/11/2014) -   Have you ever wondered why we are able to slide on ice? For example why can we sky or skate? Why do we slide on ice and not on other smooth surfaces? Well, the reason is quite simple and it is completely contained in the above image representing the so called water’s phase diagram. … Continue reading Why do we slide on ice?
Why does phosphorescence occur? (1/11/2014) - Ever wondered why the little stars glued on our rooms’ ceilings go on glowing after we’ve switched off the light? What about funny shirts or glasses which are visible at night despite darkness? Why does all this stuff happen? Well the phenomenon which is behind this cool events is called phosphorescence and we’are about to … Continue reading Why does phosphorescence occur?
Why does a microwave oven heat so quickly? (1/8/2014) - Have you ever wondered why we are able to cook food so fast in a microwave oven? Why is it so convenient in terms of time to use it instead of a classic oven? To discover what lies in the backend of a microwave oven let’s start from its main components. This kind of oven … Continue reading Why does a microwave oven heat so quickly?
Why is rum and Cola called Cuba Libre? (12/25/2013) - According to IBA (International Bartenders Association) the classic Cuba Libre must be built adding in a highball the following ingredients with the following doses: 5cl of White Rum 12cl Cola 1cl Fresh lime juice There are several hypothesis over the origin of the name of this incredibly famous cocktail. At the moment the most accepted … Continue reading Why is rum and Cola called Cuba Libre?
Why do we get glued to ice when we touch it with tongue or fingers? (12/25/2013) - Ever wondered why when we pick up an ice cube between two fingers we tend to get glued to that? And what about the horrible sensation of feeling our tongue stuck on an ice lolly during the summer? Well, this awful effect is essentially due to the moisture over our skin, which, getting in contact … Continue reading Why do we get glued to ice when we touch it with tongue or fingers?
Why is Google called Google? (12/22/2013) - Why is the world’s most utilized search engine called Google? All of you know Google, the web search engine utilized definitely by the majority of internet users. The site elaborates each year more than one thousand billion queries, involving a business of over 30 billions dollars, and representing only itself the 6% of the whole … Continue reading Why is Google called Google?
Why is the sky blue? (12/22/2013) - It is easy to see that the sky is blue. Have you ever wondered why? A lot of other smart people have, too. And it took a long time to figure it out! Let’s compose the puzzle starting from the atmosphere. The atmosphere is the mixture of gas molecules and other materials surrounding the earth. It … Continue reading Why is the sky blue?