Answer:
The critical angle for the liquid when surrounded by air is 30 degrees.
Explanation:
Given that,
The angle of incidence is 33.5° and the angle of refraction is 19.3°. Firstly, we can find the refractive index of the liquid. It can be calculated using Snell's law as :
The critical angle is given by :
Here, 
is refractive index of air and 
is refractive index of liquid.
So, the critical angle for the liquid when surrounded by air is 30 degrees.
Answer:
Using sold paper is better than to burn it because burning paper may cause pollution.
Explanation:
Hope it will help ^_^
Answer:B
Explanation:
Given
mass of Sled is m
another package of mass m is thrown on it
Suppose u be the initial velocity of sled
conserving momentum
where v is the final velocity
Initial kinetic energy 
Final Kinetic Energy
Final Kinetic Energy
Final kinetic Energy is half of initial
Answer:
the combination,decomposition or replacement that occurs in the molecules of matter during chemical change called chemical reaction
<span>Materialism claims that reality consist of physical objects and their components.
</span>Determinism<span> is the philosophical </span>position<span> that for every event there exist conditions that could cause no other event.</span>
It is is the believe that all actions and events are determined and will happen necessarily. But, If things are physical that does not mean they are determined.
