No one has "seen a black hole" but evidence of where a black hole must be has been observed.
Annabella looked through the telescope and saw Mars in the sky.
Yes, you would have to use 2 different types of hole saws. 1. Diamond Sintered hole saw to get through the porcelain to stop it from chipping. 2. Aluminium hole saw to get through the cast iron. Goodluck!
For drilling through metal with a drill, use a hole saw that is slightly larger than the diameter of the hole you need. This will help prevent the hole saw from getting stuck and make the drilling process smoother.
For cutting through stucco, the best hole saw size and type to use is a carbide-tipped hole saw with a diameter of 3 inches. This size is ideal for creating clean and precise holes in stucco surfaces.
Galileo saw in his telescope when it was 1995
If, in the middle of pitch black night, you hear a squeeling sound, smell the odor of burnt rubber, and the next morning find skid marks in the road; you feel pretty confident that there was fast moving vehicle on your road at some point in the pitch-black night -- even though you never saw one! It's the same way with black holes: their presence is marked by various, non-optical evidences. The main ones that astronomers look for are "jets" of matter moving so fast that they gives off x-rays.
You look in the mirror see what you saw get the saw cut the mirror in half 2 halfs make a hole jump through the hole.
The best way to use a 4-inch hole saw for cutting through materials is to securely attach the hole saw to a power drill, mark the center of the hole you want to cut, apply steady pressure while drilling at a slow speed, and periodically clear out the debris to prevent overheating.
The best hole saw for plastic materials is a bi-metal hole saw with a tooth pitch specifically designed for cutting through plastic. Bi-metal hole saws are durable and can handle the softer nature of plastic materials without getting dull quickly. Look for a hole saw with fine teeth and a sharp cutting edge for the best results.
For cutting through metal pipes, it is recommended to use a hole saw that is slightly larger than the diameter of the pipe. This will allow for a clean and precise cut.
You are supposed to saw the wood in half. Two halves make a whole. You jump through the "hole" and you're out. In elementary, there was a similar one, but it was with a mirror and a table. You look in the mirror you see what you saw. You take the saw. Then you saw the table in half. Two halves make a whole. You jump through the hole and you're out.
There is a black hole thingy I fell in and saw it with my gogoles