Disk a, with a mass of 8.0 kg and a radius of 90 cm , rotates clockwise about a frictionless vertical axle at 50 rev/s . disk b, also 8.0 kg but with a radius of 10 cm , rotates counterclockwise about that same axle, but at a greater height than disk a, at 50 rev/s . disk b slides down the axle until it lands on top of disk a, after which they rotate together.

Agymnast dismounts off the uneven bars in a tuck position with a radius of 0.3m (assume she is a solid sphere) and an angular velocity of 2rev/s. during the dismount she stretches out into the straight position, with a length of 1.5m, (assume she is a uniform rod through the center) for her landing. the gymnast has a mass of 50kg. what is her angular velocity in the straight position?

An object weighs 40n in air, weighs 20n when submerged in water and 30n when submerged in a liquid of unknown density. what is the density of the liquid?

Apersons beliefs and general outlook, which act like filters on the information they receive are called ?