The best way to find out the answer to this for yourself is to study tai chi. This is the easiest place to find to study this.
You can not usually see a psiball. However, there is a technique called "flaring" which causes it to be visible.
The answer to this question is unproven as psiballs have not yet been proven to exist. However, some who claimed to creating a psiball has reported that it is possible to do this. Personally, I believe I have created psiballs in the past, however, I have never been success useful in moving the psiball; this does not mean it is not possible, other explanation such as my level of skill in moving psiballs could explain this.
the benefits are making people helthier and sporty
There are various benefits to making English a universal language. For example, it would make international business easier to handle.
these help in making diagnose to the physician.
making new friends.
It doesn't.
The benefits include a great salary, full health benefits, vacation, retirement plan, and knowing your making a positive difference in people's lives.
To enable making many copies of something.
None
rational choice
making a invention