Physics A hydrogen balloon floats up because of Air pressure decreases with decrease in weight Air pressure decreases with decrease in height Weight of the balloon is less than the weight of air displaced by it. The pressure inside the balloon is more than the pressure outside it Air pressure decreases with decrease in weight Air pressure decreases with decrease in height Weight of the balloon is less than the weight of air displaced by it. The pressure inside the balloon is more than the pressure outside it ANSWER DOWNLOAD EXAMIANS APP
Physics Materials for rain-proof coats and tents owe their water-proof properties to surface tension viscosity elasticity specific gravity surface tension viscosity elasticity specific gravity ANSWER DOWNLOAD EXAMIANS APP
Physics The device used to convert solar energy into electricity is Photovoltaic cell Electrochemical cell Galvanic cell Daniell cell Photovoltaic cell Electrochemical cell Galvanic cell Daniell cell ANSWER DOWNLOAD EXAMIANS APP
Physics In which of the following processes is energy released ? Absorption Respiration Photosynthesis Ingestion Absorption Respiration Photosynthesis Ingestion ANSWER DOWNLOAD EXAMIANS APP
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