14) Bacteria do not have a nucleus. Since the nucleus contains DNA, it can be concluded that bacteria do not contain DNA. A) True B) False 15) The nucleus of a cell A) is the region of the cell where ribosomes are degraded. B) contains DNA and controls cell activities C) is contained inside the nucleolus. D) is surrounded by a single layer of membrane. 16) Organelles found outside a eukaryotic cell and usually involved in movement of the cell or movement of substances past the cell are called A) cilia and flagella B) Cell walls and plasmodesmata
Decide whether liquid solder in a tube or a can is better for your purposes. Cans are suggested for greater areas of adherence, while a tube can accomplish smaller jobs without tons of excess glue. Examine the surfaces you are planning on bonding together. For the liquid solder to work the best, the surfaces should be clean, dry, and smooth. Apply the adhesive. If you are using solder from a tube, it can be applied directly from the tube. If you are using it from a can, you should use a wooden stick or paddle to apply it to your surface. Applying liquid solder to both surfaces can be unnecessary, and usually only one surface needs to be coated.
Now, you need a flux at the solder joint to assist with melting the solder without oxidation. This is called the flow flux. Batterns and Handy Flux are the top choices. Boric acid and water is also used. 1  Batterns Self-Pickling Flux is used for hard soldering (solder that melts at a high temperature) of gold, silver, and platinum. 2  It can be diluted with distilled water if it is too thick.