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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
ray optics
researched method in socieal science with sample sarvay
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To show that soil contains air:- Place some soil in a glass jar or bottle and slowly pour water over it. Observe the air bubbles that increase by the water from the soil.
The effect of soap on surface tension Select a large plate and rinse it unless you are sure that it is very clean. Fill the plate with cold water and let it stand for a time on
Lab hygiene : The need for continuous attention to hygiene in any type of laboratory cannot be overemphasised. Any spillage of chemicals, battery acid, blood, plasma, serum, etc.
Poisons : It is essential that all dangerous substances, such as cyanides, are always kept under strict control. Steps to ensure such control are as follows: i) All substances
Decay of Arab Culture and Science: The association of science with kings, wealthy merchants and nobles which was initially very fruitful, ultimately proved to be the weakness
lable the direction of increasing frequency and the direction of increasing wavelength on the em.
Reflexes: It is of interest to know, that all sensory information does not have to go to the - brain before we can react to a stimulus. Our responses to certain stimuli
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