Physics constants
Physics constants
Chemical Symbols
Riddles
Dad jokes
100

6.63 x 10-34

100

c

3 x 108

100

helium  

He

100

What has many keys but can’t open a single lock??

a piano 

100

What do you call cheese that isn't yours?

Nacho cheese

200

μ( magnetic permeability ) 

4π x 10-7

200

G

6.67 x 10-11

200

sodium 

Na

200

What appears once in a minute, twice in a moment, but never in a thousand years?

the letter m

200

Why did the math book look sad?

it had too many problems 

300

radius of the earth 

6.37 x 106 m 

300

mass of a proton  

1.67 x 10-27

300

gold 

Au

300

Where does today come before yesterday?

the dictionary 

300

Why did the picture go to prison?

Because it was framed

400

mean lifetime of a muon 

2.2 µs

400

speed of sound in water   

1500 m/s

400

arsenic 

As

400

Which word becomes shorter when you add two letters to it?

short

400

Why didn't the bicycle stand up? 

It was two tired

500

pi (to 5 dp) 

3.14159

500

mass of the sun 

1.99 x 1030 

500
tungsten 

W

500

How many bananas can you eat on an empty stomach 

1

500

Why are elevator jokes so good 

they work on many levels