BRAIN TEASERS
Brain Teasers User Profile

秀滿清樹

rank
242
points
9
See full ranking list
short ranking list
240. Bishnu Aryal 10
241. Mike Restuccia 9
242. 秀滿清樹 9
243. Piotr Pastusiak 9
244. Zee 9
last 3 solved tasks
Find the logic behind the numbers and then find the missing number.
Find the pattern to determine what the missing number is.
Solve this number puzzle. What will be the missing number? (6, 15, 28, 45, ??)

Atomic nucleus recoil

In 1904, a letter in the journal Nature*, Harriet Brooks pointed out a peculiar type of volatility shown by an active deposit of radium immediately after its removal from the emanation. Hahn and Russ and Markower later showed (1909) that “the effect was due to the recoil of radium B from the active surface accompanying the expulsion of an alpha-particle from Radium A. This method of the separation of the elements by recoils ultimately proved of much importance in disentangling the complicated series of changes in the radioactive bodies,”according to Ernest Rutherford (1933). Thus, Harriet Brooks was probably the first person to observe the recoil of the atomic nucleus as nuclear particles were emitted during radioactive decay.(*vol. 70, p. 270)

Doctor: What’s wrong with y...

Doctor: What’s wrong with your brother?
Boy: He thinks he is a chicken.
Doctor: really? How long has this been going on?
Boy: Five years.
Doctor: Five years!
Boy: We would have brought him in earlier, but we needed the eggs.
Jokes of the day - Daily updated jokes. New jokes every day.
Follow Brain Teasers on social networks
This site uses cookies to store information on your computer. Some are essential to help the site properly. Others give us insight into how the site is used and help us to optimize the user experience. See our privacy policy.