An atom contains 15 electrons. How many protons are present in the atom?

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 are calculation for velocity and speed different

The long handle on a rake is a(n) a. lever b. screw c. wedge d. inclined plane