Radiocarbon is produced in the atmosphere as a result of
Options: collision between fast neutrons and nitrogen nuclei present in the atmosphere, action of ultraviolet light from the sun on atmospheric oxygen, action of solar radiations particularly cosmic rays on carbon dioxide present in the atmosphere, lightning discharge in atmosphere
In utensils worth Rs 1000 are produced with copper worth Rs 500, wages paid are Rs 100, other material purchased is worth Rs 100 and depreciation of machinery is zero, then what is the value added in process?
The initial increase of magnetic field in magnetic storms is caused
Options: when the shock wave, associated with the gusty solar wind, compresses the magnetosphere, when there is a large decrease in field intensity, when the gust wind itself engulfs the magnetosphere, None of the above
Options: the period in which the moon completes an orbit around the earth, the period in which the moon completes an orbit around the earth and returns to the same positions in the sky, the period of rotation of moon, None of the above