Physics The force of friction between two surfaces will increase if: The two surfaces are pressed harder Irregularities on both the surfaces are removed A layer of lubricant is kept between the two surfaces Air gap is created between the two surfaces The two surfaces are pressed harder Irregularities on both the surfaces are removed A layer of lubricant is kept between the two surfaces Air gap is created between the two surfaces ANSWER DOWNLOAD EXAMIANS APP
Physics Rolling friction is caused by ________ Buoyancy Gravity Power dissipation Non-elastic effects Buoyancy Gravity Power dissipation Non-elastic effects ANSWER DOWNLOAD EXAMIANS APP
Physics In a railway track, two rails are joined end to end with a gap in between them because Accidents due to expansion in summer can be avoided Accidents due to contraction in winter can be avoided Air-gaps are necessary for bearing the weight of running train Steel can be saved Accidents due to expansion in summer can be avoided Accidents due to contraction in winter can be avoided Air-gaps are necessary for bearing the weight of running train Steel can be saved ANSWER DOWNLOAD EXAMIANS APP
Physics Air coolers are more suitable for Hot and humid climate Cool and dry climate Cool and humid climate Hot and dry climate Hot and humid climate Cool and dry climate Cool and humid climate Hot and dry climate ANSWER DOWNLOAD EXAMIANS APP
Physics We feel cool when we sit near the fan, this is because We feel cool when air touches the body. Air vapourises the sweat on our body. Fan gives cool air. Fan cools surrounding air. We feel cool when air touches the body. Air vapourises the sweat on our body. Fan gives cool air. Fan cools surrounding air. ANSWER DOWNLOAD EXAMIANS APP
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