Skip to main content

Visit the website manishverma.site for latest posts, courses, admission & more.

History behind Nobel Prize


When Alfred Nobel's brother died, the newspaper confused the two and published Alfred's obituary instead of his brother's. As he read his own obituary, Alfred realised that the world would remember him for his invention of dynamite-an instrument of destruction. It was because of that experience that he decided to fund the Nobel Prizes. Today, most of the world knows his name in connection with humankind's greatest achievements and not as an inventor of dynamite.

Popular posts from this blog

A man starts walking from the point P (-3, 4) ....

A man starts walking from the point P (-3, 4), touches the x-axis at R, and then turns to reach at the point Q (0, 2). The man is walking at a constant speed. If the man reaches the point Q in the minimum time, then $50 [(PR)^2 + (RQ)^2 ]$ is equal to _ _ _ _ . Solution For time to be minimum at constant speed, the directions must be symmetric. In other words, the angles made by PR and RQ with the vertical must be the same just like in the law of reflection in optics. $tan \theta = \frac {MP}{MR} = \frac {NQ}{NR} $ $\Rightarrow \frac {3-r}{4} = \frac {r}{2}$ $\Rightarrow r=1 $ So, $R \equiv ( - 1,0)$ Now, $50(PR^2+RQ^2)=50[(4+16)+(1+4)]=1250$