<span>Answer:
As the ray is travelling from denser to rarer medium,
Therefore sin i / sin r = 1 / RI
= Sin 90 / Sin i = RI (Reciprocal)(Sin 90 because for critical angle Sin r= 90)
= 1 / Sin i = 3/2
= Sin i = 0.667
Now converting this value to degrees
It becomes Sin 42.
Therefore the critical angle is 42.
42 degrees = 0.733038286 radians</span>
Chemical reaction produces new substances.
If you can identify substances you look for some differents befor and after. if find then sure there was chemical reaction.
True, physical excercise helps
This question is a critical question. as we all know, when energy is added to any state of water, the particles move faster. and when energy is taken away from any state of water, the particles reduce speed. same with the particles of air. when energy is added; they move faster. when energy is removed; they move slower. so the answer is they move faster
Answer:
assembled
Explanation: because it was last weekend it was in the past so the past tense of assembled must be used