Karen massed an object 3 times using the same equal arm balance and gram massed. her results were 18.324 g 18.308 g and 18.342 g. how could she best report the mass of the object

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?

How do we measure or think of speed in the united states?

What is the single most important equation in all of physics?