BRAIN TEASERS
Brain Teasers User Profile

Slinky Li

rank
443
points
2
See full ranking list
short ranking list
441. Nadica Stojanović 2
442. Ivanka Kujundzic Orlovic 2
443. Slinky Li 2
444. Ana Kabanica 2
445. Joyce Jarrard 2
last 3 solved tasks
In a big family, Annabelle and Christopher are twins. Annabelle: ''I have 4 brothers.'' Christopher: ''I have as many brothers as sisters.'' So, how many children are there in their family?
Remove 4 letters from this sequence (WLONDOENRFAUL) to reveal a familiar English word.

Armand-Hippolyte-Louis Fizeau

Died 18 Sep 1896 at age 76 (born 23 Sep 1819). French physicist who was the first to measure the speed of light successfully without using astronomical calculations (1849). Fizeau sent a narrow beam of light between gear teeth on the edge of a rotating wheel. The beam then traveled to a mirror 8 km/5 mi away and returned to the wheel where, if the spin were fast enough, a tooth would block the light. Knowing this time from the rotational speed of the wheel, and the mirror's distance, Fizeau directly measured the speed of light. He also found that light travels faster in air than in water, which confirmed the wave theory of light, and that the motion of a star affects the position of the lines in its spectrum. With Jean Foucault, he proved the wave nature of the Sun's heat rays by showing their interference (1847).

A old woman was sipping on a g...

A old woman was sipping on a glass of wine, while sitting on the patio with her husband, and she says,"I love you so much, I don't know how I could ever live without you"...
Her husband asks, "Is that you, or the wine talking?
She replies, "It's me...talking to the wine."
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.