Change in position of object = Displacment
V^2=u^2 +2aS
U is found first by considering that first 8 secs and using v=u+at. {different v and u though}
V=-u+gt.
Magnitude of u = magnitude of v if there is no resistance ( because the conservation of energy says the k. E. must be the same when it passes you as when it left your hand).... up is negative here, down is positive.
V+v=gt
2v= g x 8
V=4xg.= the initial velocity for the next calculation
V^2=(4g)^2+(2xgx21)
So v can be calculated.
Beat frequency is given by the difference of two frequencies played together
given that
Now
Answer:
The charge of ions must be balance
Explanation:
Ionic compound: It is that compound which consist of positive and negative ions and ions held together by electrostatic force.Electric force is that force which act between two charges.
The compound is neutral because negative ions is equal to positive ions in the ionic compound.
The charge of ions must be balance.It is necessary condition for writing a formula for an ionic compound.
Hence,the charge of ions must be balance is that condition which must be met when writing a formula for an ionic compound.
