Isim sehir eyşa
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What are similarities and differences of reflection, refraction, diffraction and absorption?

Positrons are spontaneously emitted from the nuclei of

14. a body is projected with velocity vi from a. at the same time another body is projectedvertically upwards from point b withvelocity v2 lies vertically below the highestpoint. both the bodies collide thenv2÷v1is