Activity for manassehkatz‭

Type	On...	Excerpt	Status	Date
Edit	Post #285321	Initial revision	—	almost 3 years ago
Answer	—	A: Are lamps, with blistering light bulbs exposed and facing down on the user, dangersome? This looks like a typical halogen light bulb. They are: Extremely hot Very bright Very small The combination means that, until bright, efficient and affordable white LEDs came along (LEDs have been around a long time, but only recently have white LEDs become bright enough and inexpensive e... (more)	—	almost 3 years ago
Edit	Post #283986	Initial revision	—	about 3 years ago
Answer	—	A: Is it plausible to desire a "universal" calendar applicable everywhere in our universe? No. A calendar or, more generally, a time measurement system, can be based on anything. While human calendars have (generally) been based on: Day = One cycle of the Earth's rotation Month = One cycle of the moon's revolution around the Earth Year = One cycle of the Earth's revolution aroun... (more)	—	about 3 years ago
Edit	Post #281326	Initial revision	—	over 3 years ago
Answer	—	A: Is it rational to freeze water bottles during colder nights, and place them in front of a fan during warmer days? TL;DR Yes, that will work. It may not be practical, but that is a separate issue. There are two measurements routinely used for cooling in the US: BTU = British Thermal Unit = heat to raise the temperature of one pound of water by one degree Farhenheit Ton = 12,000 BTU per hour Why 12,000... (more)	—	over 3 years ago
Comment	Post #280853	It is only Physics as one step in [XKCD](https://xkcd.com/435/) (more)	—	almost 4 years ago