Physical Ed

7th

grade

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Doppler Effect

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10 questions

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  • 1. Multiple Choice
    2 minutes
    1 pt
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    จากรูป source มีการบีบแตรตลอดเวลา จงหาสมการ  flf_l  

     fl=(v+vlv)fsf_l=\left(\frac{v+v_l}{v}\right)f_s  

     fl=(vvlv)fsf_l=\left(\frac{v-v_l}{v}\right)f_s  

     fl=(vv+vs)fsf_l=\left(\frac{v}{v+v_s}\right)f_s  

     fl=(v+vlv+vs)fsfl=\left(\frac{v+v_l}{v+v_s}\right)f_s  

  • 2. Multiple Choice
    2 minutes
    1 pt
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    หาคำตอบ

    fl=(vv+vs)fsf_l=\left(\frac{v}{v+v_s}\right)f_s

    fl=(vvlv+vs)fsf_l=\left(\frac{v-v_l}{v+v_s}\right)f_s

    fl=(vvvs)fsf_l=\left(\frac{v}{v-v_s}\right)fs

    fl=(v+vsv)f_l=\left(\frac{v+v_s}{v}\right)

  • 3. Multiple Choice
    2 minutes
    1 pt
    Image

    สู้ๆ

    fl=(vv+vs)fsf_l=\left(\frac{v}{v+v_s}\right)f_s

    fl=(vvvs)fsf_l=\left(\frac{v}{v-v_s}\right)f_s

    fl=(v+vsv)fsf_l=\left(\frac{v+v_s}{v}\right)f_s

    fl=(v+vlvvs)fsf_l=\left(\frac{v+v_l}{v-v_s}\right)fs

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