Answer:
Explanation:
You need to remember that the oxidation number of H is +1, except when it is in a metal hydrites like NaH, where its oxidation number is -1. Then, the oxidation number of O is -2, but in peroxides is -1. So with these rules you just have to multiply the ox. number with the name of atoms and all the elements in the reaction must sum 0.
Answer:
B
Explanation:
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Liquid is water or drink and solid is hard
Answer : The angular acceleration is 
Solution : Given,


The given angular velocity equation is,

At t = 0, 
At t = t, 
Angular acceleration : It is defined as the rate of change of angular velocity with respect to time.
Formula used for angular acceleration :

where,
= angular acceleration
= angular velocity at time 't'
= angular velocity at time '0'
t = time
Now put all the given values in this formula, we get the angular acceleration.


Therefore, the angular acceleration is 