When a light wave strikes an object, it can be absorbed, reflected, or refracted by the object. All objects have a degree of reflection and absorption. ... In the natural world, light can also be transmitted by an object. That is, light can pass through an object with no effect (an x-ray, for example).
Answer:0.69
Explanation:
Coefficient of kinetic friction=f/R=61.8/90=0.69
I believe the answer is the second one.
Answer:
A push or pull exerted on an object
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