sheet metal tubes

Metallic tubes without any joints are produced by the electrolytic method. For example, depositing on hollow lead tubes serving as cathode, in an electrolytic bath of copper sulphate using copper anodes, makes seamless copper tubes. The lead is later melted ..

The length and width of a metal sheet are 24 in. and 12 in. respectively. Find the area of the metal sheet. => 288 in. 3 or 288 in. 2 or 228 in. 2 or 72 in. 2..

The length and width of a rectangular metal sheet are 15 in . and 8 in . respectively. Find the area of the rectangular metal sheet. => 80 in. 2 or 60 in. 2 or 100 in. 2 or 120 in. 2..

Eelectroplating with metals like nickel, chromium, cadmium etc. prevents rusting. Galvanising and tinning are also very effective metallic coatings. Galvanising involves dipping of iron sheet into molten zinc. A thin layer of zinc sticks to the iron. In tinning, tin i..

In metallic crystals the constituent particles are positive kernels i.e., nuclei where inner electrons are dispersed in a sea of mobile valence electrons. The forces present between the constituents are metallic bonds. The main characteristics of metallic crystals are..

="tblcel">Their densities are usually low. Melting point They usually have a high melting point except mercury, cesium, gallium, tin, lead. Their melting points are low. Boiling point Their boiling points are usually high. Their boiling points are low. Hardness They are usually hard, except mercury..

Non Metals - Introduction - Non-metals are the elements in groups 14-18 of the periodic table. Non-metals are not able to conduct electricity or heat very well. As opposed to metals, non-metallic elements are very brittle, and cannot be rolled into ..

Hydrogen acts as a reducing agent when acting with some metallic oxides. A reaction in which oxygen is taken away from a compound is known as 'Reduction'. When passed over heated metallic oxides, hydrogen reduces the oxides to the respective metals by removing oxygen...

When a metal sheet of rectangular shape is heated, its length is increasing at 2 cm per second and width at 3 cm per second. Find the rate of change of its area, when its length is 14 cm and width is 12 cm? => 26 cm 2 /sec or 42 cm 2 /sec or 66 cm 2 /sec or 64 cm 2 /sec or 24 cm..

. They penetrate through thin sheets of aluminium or other metal. Cathode rays effect photographic plates. The ratio of charge to mass i.e. charge/mass is the same for all the cathode rays irrespective of the type of gas used in the tube. The above observations lead us to conclu..