Physics It is easier to roll a barrel full of coal tar than to pull it because the rolling friction is much less than the sliding friction more surface area of the barrel is in contact with the road when it is pulled the full weight of the barrel comes into play when it is pulled coal tar is a liquid and it flows in the barrel when it is rolled the rolling friction is much less than the sliding friction more surface area of the barrel is in contact with the road when it is pulled the full weight of the barrel comes into play when it is pulled coal tar is a liquid and it flows in the barrel when it is rolled ANSWER DOWNLOAD EXAMIANS APP
Physics An egg sinks in soft water but floats in a concentrated solution of salt because Albumin dissolves in salt solution and egg becomes lighter Water has high surface tension Egg absorbs salt from the solution and expands The density of salt solution exceeds the density of eggs Albumin dissolves in salt solution and egg becomes lighter Water has high surface tension Egg absorbs salt from the solution and expands The density of salt solution exceeds the density of eggs ANSWER DOWNLOAD EXAMIANS APP
Physics The instrument used to measure the speed of the wind is Chronometer Dosimeter Anemometer Altimeter Chronometer Dosimeter Anemometer Altimeter ANSWER DOWNLOAD EXAMIANS APP
Physics Suitable impurities are added to a semiconductor depending on its use. This is done in order to increase its life increase its electrical resistivity enable it to withstand higher voltages increase its electrical conductivity increase its life increase its electrical resistivity enable it to withstand higher voltages increase its electrical conductivity ANSWER DOWNLOAD EXAMIANS APP
Physics Two stones of different masses are dropped simultaneously from the top of a building Larger stone reaches the ground earlier Both the stones reach the ground at the same time Depends on the composition of the stone Smaller stone reaches the ground earlier Larger stone reaches the ground earlier Both the stones reach the ground at the same time Depends on the composition of the stone Smaller stone reaches the ground earlier ANSWER DOWNLOAD EXAMIANS APP
Physics When a body falls from an aeroplane, there is increase in its Potential energy Kinetic energy Acceleration Mass Potential energy Kinetic energy Acceleration Mass ANSWER DOWNLOAD EXAMIANS APP
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