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Making a precision reflecting telescope
It is fairly beyond the scope of this book to include the intricate details for mirror grinding and testing. Though, some teachers may wish to have able pupils engage in making a better telescope. Attention is thus directed to the excellent book called Amateur Telescope
Technical Developments in Feudal Society: Other innovations used and improved by the Europeans were the lenses and the spectacles. This gave an impetus to the further study
would quartzite or sandstone break more easily. please explain
in a reaction 5.3g of sodium carbonate reacted with 6g of ethanic acid. theproducts were 2.2 g of carbon dioxide , 0.9g water and 8.2 g of sodium ethanoate, show that these observa
Dating the Past: Today, that a particular rock is a million ycars old, or a fossil is 50 thousand ycars old. For instance, how do we estimate the duration of various geo
State the Role of Algae - Weathering Algae also plays an important role because it brings about increase in organic matter due to photosynthesis. The organic matter and CO2 fo
Military Applications: Another area where the above mentioned properties of lasers are being used with a 'deadly' precision is that of military applications. Lasers have been
What divides the outer core from the mantle above it? There is a gradual transition caused by a vary in temperature and decreasing pressure..
what is the weigt on earth of an object that has a mass of 22 kg?
State the harmul effects of Acidity of soil Acidity of soil may have harmful effects on plants due to the effect on enzymatic changes, reduced availability of nutrients like c
During which equinoxes are day and night of equal length around the world: Autumnal And Vernal Equinoxes
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