Answer:
It conserves both energy and momentum in the collision at the same time. By design, when the balls collide the strings that hold them up are vertical (assuming balls are only swung from one side).
Explanation:
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Answer:
Molecules are made up of atoms that are held together by chemical bonds. These bonds form as a result of the sharing or exchange of electrons among atoms. The atoms of certain elements readily bond with other atoms to form molecules. ... The element helium is a one-atom molecule.
Answer:
Stage fright
Explanation:
Stage fear is one that a person experiences when he feels exposed to what others are going to say. This feeling is characterized by the fear of public speaking. Some common causes are large crowds or stress associated with an important presentation where people can stutter and do a poor job.
Answer:
(a) 
(B) 
Explanation:
We have given the the speed of the electron =10^6 m/sec
The time period of the electron is given by 
where r is the Bohr radius, which is equal to 
So time period 
(A) We know that current 
(B) Magnetic moment is given by 
, where I is current and A is area
So 
