| Difficulty | Secondary School | High school/other |
| ★ | Basic | Easy |
| ★★ | Demanding | Basic |
| ★★★ | Demanding | |
| ★★★★ | Difficult | |
| ★★★★★ | Very difficult |
Specify the velocity of the puck.
Answer: $28\ m/s\ \left(\approx101\ km/h\right)$
| Difficulty | Secondary School | High school/other |
| ★ | Basic | Easy |
| ★★ | Demanding | Basic |
| ★★★ | Demanding | |
| ★★★★ | Difficult | |
| ★★★★★ | Very difficult |
Specify the index of refraction of glass.
Answer: 1,5
| Difficulty | Secondary School | High school/other |
| ★ | Basic | Easy |
| ★★ | Demanding | Basic |
| ★★★ | Demanding | |
| ★★★★ | Difficult | |
| ★★★★★ | Very difficult |
Specify the density of a body? What material could a body be?
Answer: $8{,}3\ g/{cm}^3 - 8{,}5\ g/{cm}^3$
| Difficulty | Secondary School | High school/other |
| ★ | Basic | Easy |
| ★★ | Demanding | Basic |
| ★★★ | Demanding | |
| ★★★★ | Difficult | |
| ★★★★★ | Very difficult |
a) Define the total resistance. b) How high is the resistance with one resistor? The components in the video are standard resistors with the same resistance.
Tip: Series resistors total resistance is equal to the sum of the individual resistances.
Answer: a) $440\ \Omega$, b) $220\ \Omega$