what is nuclear reaction ?
A nuclear reaction is the process of strong interaction of a stable nucleus with suitable high energy elementary particle resulting in the formation of a new nucleus and one or more new particles.
angle of contact.
It is defined as the angle between the tangent to the liquid surface at the point of contact and solid surface inside the liquid is called as angle of contact The value of angle of contact depends upon (i) Nature of solid and liquid in contact (ii) Cleanliness of the surface in contact (iii) Medium above the free surface of liquid
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