What scenario would most likely lead to a higher level of physical fitness among people who live in a city?

Which statement is true for light passing into a medium that is more optically dense than the first medium through which it past

Awheelhas a radius of 4.8 m. howfar (path length) does a point on the circumference travel if thewheel is rotated through angles of 30°, 30 rad, and 30 rev,respectively?

Density of salty water as compared to the density of pure water is(a) is less(b) is always equal(c) is always more(d) may be less or more