Roberto Abraham Scaruffi

What are some easy ways to make a million dollars? Tony Rush, Reader. Tea drinker. Rationalist. Bes... 1.2k votes Lawrence Tam gave a great answer below. Let me add this... Making a million dollars is not as complex as many people believe. Play with the numbers. ... Read More »

Which language is best, C, C++, Python or Java? Andrea Ferro 645 votes If you are writing an operating system, I suggest you use C. If you are writing a very complex application where execution speed is extremely important, I suggest you use C... Read More »

What should every person be knowledgeable about or be proficient in by the age of 20? Ben Mordecai, Automation Controls Engineer 4k votes How to cook 10 good meals How to dress like an adult and not a teenager How to get enough sleep on a daily basis How to manage your tasks, projects, and calendars so that you ...  Read More »

Does electricity travel at the speed of light? Michael Williams 159 votes There is a simple answer and a complicated answer. Simple - no. The electrons in a wire that form the electric current move very slowly. The second hand on a watch moves f... Read More »

What foods do a lot of people think are healthy, but are actually unhealthy? And vice versa? Peter Flom, Independent statistical consultant fo... 734 votes I think the biggest mistake is trying to dichotomize all food into either "healthy" or "unhealthy". Let's take salt. In the modern western diet nearly everyone gets plenty... Read More »

Grandi's divergent series, 1 - 1 + 1 -1..., doesn't have a sum. But the sum "should be" 1/2 according to the Ramanujan summation and other techniques. What exactly is the general consensus behind this series? Do more people believe the sum is 1/2, or that there is no sum? Daniel McLaury, Aspiring Mathematician 35 votes The sum doesn't converge, but if you use more general notions of summability than convergence then it has the sum 1/2. This isn't a controversy, any more than it's controv... Read More »

What methods can I use to avoid getting so tired when I do the same amount of a work as my peers who do not get so tired? Michal Ugor, www.getbotto.com, travelling entrepre... 2.7k votes I used to be chronically tired. I am not anymore. This was a result of 3-4 years of effort. Here is what worked: Experiment with your diet: I would try some forms of diet ... Read More »

The moon is roughly 250,000 miles from Earth. Escape velocity from Earth orbit is roughly 25,000 miles per hour. How is it that a trip from Earth orbit to Lunar orbit takes, not ~ 10 hours, but about 3 days? Robert Frost, engineer/instructor at NASA 892 votes A spacecraft enroute from Earth to the Moon does not travel at a constant velocity. Nor does it travel in a straight line. Nor does it have to achieve escape velocity. S... Read More »

Can money buy happiness? Shikhar Agarwal, Top Writer. CS'12 IITian exploring th... 1.7k votes Yes! It sure can. And not just temporary! It can buy you eternal happiness. Imagine a starved person who has just got food. Imagine a disaster victim who has just got aid...  Read More »

Is there a function that is its own 3rd derivative? Natalia Nezvanova, Наталья Незванова 484 votes Let  be a differential operator, and let  be an unknown function. We would like to find a function  such that , or, . Given that this is a 3rd order linear ODE with constan... Read More »