Physics A hydrogen balloon floats up because of Air pressure decreases with decrease in weight The pressure inside the balloon is more than the pressure outside it Air pressure decreases with decrease in height Weight of the balloon is less than the weight of air displaced by it. Air pressure decreases with decrease in weight The pressure inside the balloon is more than the pressure outside it Air pressure decreases with decrease in height Weight of the balloon is less than the weight of air displaced by it. ANSWER DOWNLOAD EXAMIANS APP
Physics Among the following materials sound travels fastest in Steel Vacuum Water Air Steel Vacuum Water Air ANSWER DOWNLOAD EXAMIANS APP
Physics A good conductor while carrying current is Negatively charged Alternately charged positive and negative Electrically neutral Positively charged Negatively charged Alternately charged positive and negative Electrically neutral Positively charged ANSWER DOWNLOAD EXAMIANS APP
Physics In general, which is the cause of a land breeze? Heat Temperature None of these Pressure Heat Temperature None of these Pressure ANSWER DOWNLOAD EXAMIANS APP
Physics Why does bleeding occur through the nose in high mountainous regions ? The pressure at high altitudes is greater than that on the plains The blood pressure of a person increases at high altitudes The blood pressure fluctuates and finally decreases drastically The pressure of blood in capillaries is greater than the outside pressure The pressure at high altitudes is greater than that on the plains The blood pressure of a person increases at high altitudes The blood pressure fluctuates and finally decreases drastically The pressure of blood in capillaries is greater than the outside pressure ANSWER DOWNLOAD EXAMIANS APP
Physics On a cold day when the room temperature is 15°C, the metallic cap of a pen becomes much colder than its plastic body, though both are at the same temperature of 15°C, because : Plastics have a lower density than metals Plastics have a higher thermal conductivity than metals Metals have higher thermal capacity than plastics Metals are good conductors of heat Plastics have a lower density than metals Plastics have a higher thermal conductivity than metals Metals have higher thermal capacity than plastics Metals are good conductors of heat ANSWER DOWNLOAD EXAMIANS APP
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