potato3999
24.10.2020 •
Physics
A girl bikes for 3 hours at a speed of 40 km/hr. What distance did she travel?
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Ответ:
distance = 120km
Explanation:
speed = 40km/hr
time = 3 hours
distance = ?
speed = distance/time
distance = speed × time ( making distance the subject)
distance = 40km/hr × 3 hrs
distance = 120km
Ответ:
Optical fibers work on the principle of total internal reflection.
When light ray strikes at the internal surface of optical fiber cable called such the incidence angle is greater than the critical angle, then incident light ray reflects in the same medium, and this phenomenon repeats.
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