General Physics
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137 Sprayer functions on :
138 Radio activity is due to :
139 Who among the following developed the technology of underground nuclear explosion ?
140 When a ring of metal is heated what happens to its hole ?
141 Ice cubes are added to a glass of pure water and a glass of pure alcohol. The ice would be
142 Why the needle of iron swims on water surface when it is kept gently ?
144 Holography is a technique of :
145 If a copper wire is increased to double its length, its resistance will become
146 Which combination of colour is the most convenient during day and night time ?
147 The fundamental scientific principle in the operation of battery is :
148 Wollen clothes keep the body warm because