Recent content by zipking1988

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    How Does the Doppler Effect Explain the Ambulance Siren Frequency Change?

    Any please i need your help !
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    How Does the Doppler Effect Explain the Ambulance Siren Frequency Change?

    A charge Q is placed at the origin (0,0) of an x-y plane.The proportionality constant of Coulomb 's law is donated as Ko . Q1 ,From 1-5 below choose the answer that correctly represents field E at point (x.y) ,where E=(Ex,Ey).here Ex is the x-component of E and Ey is the y-component of E ...
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    How Does the Doppler Effect Explain the Ambulance Siren Frequency Change?

    Q2:As show in the figure below ,circuit A is formed by connecting two direct power sources(electromotive force :15v and 5 v ) and two capacitor (capacitor 1uF and C),and circuit B is formed by connecting the same two power sources and two resistors (resistance:1kohm and R) .The connection point...
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    How Does the Doppler Effect Explain the Ambulance Siren Frequency Change?

    some exam question(help help !) Q1.A train traveling at 30 km/h is approached from behind by an ambulance sounding its siren.The ambulance ,which is traveling at a constant speed along a road parallel to the railroad,passes the train and subsequently stops at a distant point ahead of the train...