Which type of reaction produces the most harmful radiation ?
1). Fusion reaction
2). Fission reaction
3). Chemical reaction
4). Photo Chemical reaction
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2. A small gap is left at the joints of rails in a railway track to
3. What factors contribute to global winds?
4. Siphon will fail to work if
5. The final image in a simple microscope is
7. In ________ motion of a body its velocity varies with time.
8. Radio waves sent out by a radio stations are reflected by
9. ?Which are the relevant waves in?telecommunication?
10. Why does a fountain pen leak in aeroplane flying at a height?