Physics The force of friction between two surfaces will increase if: A layer of lubricant is kept between the two surfaces Air gap is created between the two surfaces Irregularities on both the surfaces are removed The two surfaces are pressed harder A layer of lubricant is kept between the two surfaces Air gap is created between the two surfaces Irregularities on both the surfaces are removed The two surfaces are pressed harder 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 Steel can be saved Accidents due to contraction in winter can be avoided Air-gaps are necessary for bearing the weight of running train Accidents due to expansion in summer can be avoided Steel can be saved Accidents due to contraction in winter can be avoided Air-gaps are necessary for bearing the weight of running train ANSWER DOWNLOAD EXAMIANS APP
Physics Air coolers are more suitable for Cool and dry climate Hot and dry climate Hot and humid climate Cool and humid climate Cool and dry climate Hot and dry climate Hot and humid climate Cool and humid 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. Fan cools surrounding air. Air vapourises the sweat on our body. Fan gives cool air. We feel cool when air touches the body. Fan cools surrounding air. Air vapourises the sweat on our body. Fan gives cool air. ANSWER DOWNLOAD EXAMIANS APP
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