[" The cable strung between two "],[" neighbouring electricity posts "],[" sags a little.The mass per unit "],[" length of the cable is "lambda," the "],[" distance between the posts is "],[" L,and the 'maximum sag' of "],[" the cable is "d(d<

A thin bar of length L has a mass per unit length lambda , that increases linerarly with distance from one end. If its total mass is M and its mass per unit length at the lighter end is lambda_(0) , then the distance of the centre of mass from the lighter end is

If the length of the unit cell is 5^(0)A the smallest distance in .^(0)A between the two neighbouring metal atoms in a face centred cubic lattice is

The force between two point electric charges kept at a distance d apart in air is F. If these charges are kept at the sme distance in water, the force between the charges is F'. The ratio F'//F is equal to ……….. .

Two charge each Q are released when the distance between is d .Then the velocity of each charge of mass m each when the distance between them is 2d is

R and r are the radii of two circles (R > r). If the distance between the centres of the two circles be d, then length of common tangent of two circles is

A person standing between two posts finds that angle subtended at his eyes by the tops of the post is right angle.If height of the post is two xx and four xx,the height of the person and distance between two post is equal to the length of the longer post.Find the ratio of distance of the person from shorter to longer post.

Two points are at distance a and b (a lt b) from a long string of charge per unit length lambda . The potential difference between th epoints is proportional to

A string is fixed between two rigid support. Mass per unit length of the string is lambda. Now the tension in the wire is decreased by 19% . The percentage decrease in frequency will be