Naphthalene is an organic compound with formula c 10 h 8 it is the simplest polycyclic aromatic hydrocarbon and is a white crystalline solid with a characteristic odor that is detectable at concentrations as low as 0 08 ppm by mass.
Characteristics of rubber ball after adding water.
Balls become softer with use.
Some balls are not very bouncy to begin with like squash balls.
A steel ball on a steel floor is amazingly bouncy.
Balls bounce differently on different axes.
Rubber ball cotton balls sponge face towel rug t shirt.
In one cup add one tablespoon of vinegar and two spoons of water.
If the ball is made of rubber then the stiffness argument above would incline me to predict that the ball will still be less bouncy when cold.
Make sure you are wearing the chemical splash goggles to avoid the possibility of vinegar coming into contact with the eye.
5 use the spoon and put the rubber ball in the cup from step 2 to wash it.
Each can from the same manufacturer can be different.
Balls may bounce higher after use.
Keep count of the number of cotton balls as you add them to the water.
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2 form a group of 4 members each and choose among your group the person who will act as timer recorder leader and presenter.
Add1 2 teaspoon of rubber latex into the cup with vinegar.
While you wash the ball squeeze out any excess water from the latex ball and any bubbles of trapped vinegar inside the ball.
Some kinds of stiff materials do not dissipate energy very much like steel.
4 stir with the spoon and try to form a glob of rubber into a ball.
Fill the other cup half way with water.
Tightly secure the jar lid and shake it until the glue is fully diluted and no gooey clumps remain.
Ask your students if these will.
Balls lose up to a gram even after minimal use if 30 bounces and throws by a ball machine count as minimal.
It will be necessary to wash the ball in a sink with the water running or in a tub of water.
Each ball in a can is different in weight diameter and bounce.
It is best known as the main ingredient of traditional mothballs.
In one glass jar add three tablespoons of water and three tablespoons of elmer s glue.