How everything in physics is connected in one awesome map

YouTuber Dominic Walliman has created a map that shows how the many branches of physics link together, from the earliest days of classical physics and Isaac Newton, all the way through to Einstein’s relativity and quantum physics (with a little bit of philosophy thrown in there for good measure). Walliman has also created an animation

Crossing River Puzzle

There are 8 people who have to cross the river on a raft. 1. Policeman (P) 2. Thief (T) 3. Father (F) 4. Boy 1 (B1) 5. Boy 2 (B2) 6. Mother (M) 7. Girl 1 (G1) 8. Girl 2 (G2) The rules are: Only two people can cross at a time. Only the adults 

The City of Lies and the City of Truth

You are at an unmarked intersection … one way is the City of Lies and another way is the City of Truth. Citizens of the City of Lies always lie. Citizens of the City of Truth always tell the truth. A citizen of one of those cities (you don’t know which) is at the intersection.

Climbing Snail

A snail is at the bottom of a 20 meters deep well. Every day the snail climbs 5 meters upwards, but at night, it slides 4 meters back downwards. How many days does it take before the snail reaches the top of the well? Answer: The answer is actually 16 days. Why? On the first

Square Root 12345678987654321

We all know that square root of number 121 is 11. What is the square root of „12345678987654321“? Answer: The pattern is that the highest number, the one in the middle of the sequence such as 1234321 is the number of 1’s in the square root. Square root of number 121 is 11 Square root

Cannibals and Missionaries

There are 3 missionaries and 3 cannibals that need to cross a river. There is only 1 way across the river and that is by boat. There is only 1 boat and the boat will hold at most two people. You cannot have more cannibals than missionaries on one side of the river or else

Crossing a River With a Wolf, Goat & Carrots

Can you get all four across the river safely? Only the man and at most one other item are allowed in the boat for each crossing. Only the man is able to operate the boat. Unfortunately, if the wolf is left alone with the goat it will eat it, as will the goat eat the

The Giraffe in the Refrigerator

The following short quiz consists of 4 questions that will help you understand your thinking style better. These questions are all connected and not difficult. 1. How do you put a giraffe in the refrigerator? 2. How do you put an elephant into a refrigerator? 3. The Lion King is hosting an animal conference. All

Puzzling Missing/Appearing Person Illusion

Basically, you count the number of men in the image, wait a few seconds for the top two pieces to switch, and count again. The left top side of the image goes up and slides over to the right, while the right side of the image slides to the left. In this image, there are

The Missing Dollar

Three people check into a hotel. They pay $30 to the manager and go to their room. The manager finds out that the room rate is $25 and gives $5 to the bellboy to return. On the way to the room, the bellboy reasons that $5 would be difficult to divide among three people, so