Cores are made by adding a heavy substance such as bismuth graphite or barium either to resin, making a very dense type of plastic, or to a ceramic material.
It look like a ball and it has a small ball inside
Think of any ball you have ever held in your hand. A baseball, a softball, a tennis ball, a bowling ball - those are all spheres.
very messy if it hit somebody
A see threw cannon ball(jelly inside) with tentacles
Bowling does not have a uniform per se. Most professional tend to wear slacks and a button up loose shirt with their names on the back of them. Common bowling equipment consist of a bowling ball, weighing between 6-16 pounds and a pair of bowling shoes. The shoes normally consist of a rubber heel and a slide pad on the front.
In most cases, a bowling proshop is located within or adjoining a bowling center.There are a few standalone retail shops, such as in Milwaukee, WI.Visit your local center and ask about their proshop.
Every uniform is different.
In tenpin bowling, the inserts uses vary for different bowling. Some like the feel or the way they look. Some have inserts to aid them in a better grip. The most common reason however, is to help with release and rotation. This is especially true of the finger grips which will the bowler to "flip" the ball during release adding a litle extra rotation than might otherwise be possible.
look like a ball
It looks like a volcano. +++ No it doesn't. A volcano is in rock. The Sun (or any similar star) is a ball of extremely hot, radioactive, gas.
what does the inside of jupiter look like
Like you see in the movies. It was round like a bowling ball but smaller. Artillery from that time was classified by the weight of the projectile rather than the caliber of the gun, and it continued to be done this way in Great Britain in World War 2.