It's called "Newton's Cradle".
It's also known as "Balance Balls", "Newton's Pendulum", and "Newton's Balls"
This toy demonstrates the law of conservation of momentum.
you should call someone
Usually, what you would call a thing to but other things in is a container. It contains the items you wish to put in to, so they will not escape and run wild through your home like savages in the jungle. :)
Yes, no other umpire can overrule a ball-strike call.
A Woman.
Call my girlfriend over.
A juggler.
Layered balls of ice are called ice spheres or ice balls. These are typically used for chilling beverages without diluting them as quickly as regular ice cubes.
You can't call her. Her mobile number and other personal details are private.
Ecosystem
servant
my balls
Water balls