1M.1. a pram
2M.2. pulleys on a railway car
3M.3. a restless washing machine
4M.4. negative Moon
5M.5. relaxing at a train station
6M.6. the importance of having passengers
7M.7. a football problem
8M.8. a wall
9M.9. pulleys on an inclined block
10M.10. A
11M.11. falling coins
12M.12. leaping coin
13M.13. climbing
14M.14. an impact into a wall
15M.15. non-quantum entanglement
16M.16. water planet
17M.17. slot car racing
18E.1. the anti-diet of the Earth
19E.2. Diomede Islands
20E.3. water on Mars
21E.4. rolling in the Neanderthal way
22E.5. dry
23E.6. hanging clothes
24E.7. gravitation
25E.8. rope on an inclined plane
26X.1. massive crash
27X.2. Pythagorean theorem not working
28X.3. poisoned
29X.4. malicious X
30X.5. slip
31X.6. cruel game of fate
32X.7. even more malicious X
33A.1. flight from the Sun
34A.2. SETI frequency
35A.3. gravitation in The Orwille
36A.4. a little crescent moon
37A.5. a New Year’s comet
38A.6. deadly Sun
39C.1. non-ideal ammeter
40C.2. cuboids
41C.3. inductors
42C.4. infinite and nasty circuit
43C.5. long wiring
44O.1. clapping at a concert
45O.2. a bubble in ice
46O.3. at a concert
47O.4. bells
48O.5. soliloquy
49O.6. a bubble in a paperweight
50T.1. drinking water
51T.2. a little sun
52T.3. a simplified model of a balloon
53T.4. hot ball
54T.5. a breakfast in Dukovany
55T.6. oscillating piston
56T.7. a mining poison