Physics In a railway track, two rails are joined end to end with a gap in between them because Accidents due to contraction in winter can be avoided Accidents due to expansion in summer can be avoided Steel can be saved Air-gaps are necessary for bearing the weight of running train Accidents due to contraction in winter can be avoided Accidents due to expansion in summer can be avoided Steel can be saved Air-gaps are necessary for bearing the weight of running train ANSWER DOWNLOAD EXAMIANS APP
Physics Friction is caused by the ________ on the two surfaces in contact. Gaps Smoothness Densities Irregularities Gaps Smoothness Densities Irregularities ANSWER DOWNLOAD EXAMIANS APP
Physics A car parked in the sun with its windows closed gets terribly hot inside. This is due to The greenhouse effect The double layered wind shield The good conducting power of the metal body The heat emitted by the engine The greenhouse effect The double layered wind shield The good conducting power of the metal body The heat emitted by the engine ANSWER DOWNLOAD EXAMIANS APP
Physics Which electromagnetic radiation is used for satellite communication ? Radiowave Infrared Ultraviolet Millimeter wave Radiowave Infrared Ultraviolet Millimeter wave ANSWER DOWNLOAD EXAMIANS APP
Physics Angle of friction and angle of repose are None of these Not equal to each other Equal to each other Proportional to each other None of these Not equal to each other Equal to each other Proportional to each other ANSWER DOWNLOAD EXAMIANS APP
Physics What type of force acts on a car moving around a curve? Centrifugal force Cohesive force Gravitational force Centripetal force Centrifugal force Cohesive force Gravitational force Centripetal force ANSWER DOWNLOAD EXAMIANS APP
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