The effect of current electricity
1 answer:
Answer:
(3 ) friction hope this is correct
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Answer:
a
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Answer: It wouldn't be as modern as today is we would be back to using oil and other things from back then there wouldn't be cars everything would be less machined.
propagated disturbance is a variation
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Answer:
reflection :
angle of reflection and angle of incidence is equal Incident ray and reflect d ray plus normal lies on the same plan on a same point light reflect uniformly if it is incident on a plan surface refraction :
light will refrect if light goes from rare medium to a dense medium or vice versa after the light is refracted, it retunes to its original direction angle of incidence is not equal to the angle of refraction
