Answer:
B. The maximum angle decreases
Explanation:
If θ be the maximum angle of a slope that allows a crate placed on it to remain at rest , following condition exists .
tanθ = μ , θ is called angle of repose . μ is coefficient of static friction .
So the tan of angle of repose θ is proportional to coefficient of static friction.
If coefficient of static friction is less than .7 , naturally angle of repose will also become less ,ie, it at lower angle of inclination , the object will start slipping .
C. Light sometimes behaves like waves and at other times like particles.
Let us first write down the known things .
1660 megawatts = 1660 X 10^6 watt
= 166000 kilowatt
From the above deduction we can conclude that the correct option among all the options that are given in the question is the second option or option "B". I hope that this is the answer that you were looking for and the answer has actually come to your desired help.
The word you are looking for is <em><u>refraction. </u></em> Reflection is when 100% of the light is bounced back, refraction, however if when light <em>bends</em>, or, changes wavelengths.
