Activity for John Zhau
| Type | On... | Excerpt | Status | Date |
|---|---|---|---|---|
| Question | — |
Santa's new delivery service: a... cannon? Let's say Santa got himself a new toy: a present delivery cannon. With this new cannon, he wants to deliver presents to children by shooting their presents from the cannon into their chimneys. Let's assume the cannon has 100% accuracy with a "present protection" feature, where presents shot from it c... (more) |
— | about 5 years ago |
| Question | — |
A bullet that makes the target explode I'm looking for a bullet that makes the target explode. A bullet filled with explosives and explodes on impact does not suffice. It has to make the target explode somehow. Currently, my only idea is a bullet that meets such a requirement is a heat bullet: when shot at a target with water (organic li... (more) |
— | about 5 years ago |
| Question | — |
How fast does an antimatter bullet need to move to pierce rather than explode? The environment is set in (ideal) space with no air for the bullet to interact with. It should encounter nothing until it reaches its target. The bullet is assumed to be a perfect sphere with a diameter of 7mm (what I believe is common for sniper rifles) and is made of antimatter. All variables shou... (more) |
— | about 5 years ago |
| Question | — |
Can transistors be made in the stone age? (Spoiler: Dr.Stone) WARNING: This post contains some spoilers for the anime/manga Dr.Stone. As I'm watching Dr.Stone, I see Senku and the gang trying to make vacuum tubes for their circuits. The vacuum tube is an ancestor to the transistor. It is quite hard to make and is fragile because glass is used to enclose a vacu... (more) |
— | about 5 years ago |