An electromagnetic wave is transporting energy in the negative y direction. at one point and one instant the magnetic field is in the positive x direction. the electric field at that point and instant is a. positive y direction explain b. negative y direction c. positive z direction d. negative z direction e. negative x direction

D.negative z direction.

Explanation:

Hello,

In this case, electromagnetic waves are waves that result when vibrations between an electric field and a magnetic field are exhibited, it means they are composed by both oscillating magnetic and electric fields. In such a way, when the electromagnetic wave is moving across the x-direction, the associated magnetic field oscillates across the xz-plane and the corresponding electric field across the xy-plane.

In this manner, the referred electromagnetic wave is transferring energy across the negative y direction, in addition, the magnetic field turns out positive across the x direction. Considering the aforesaid reasons, one concludes that the electric field at that point and instant is in the negative z direction.

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for points guys

when the volume of gas is   changed from   717.73 ml   to 852 ml   the temperature will   change   from 315   c to 452   c

    calculation

this is calculated using the charles law formula

that is,   v1/t1 = v2/t2

          v1=?

        t1 = 315 c   into   kelvin = 315 +273 = 588 k

        v2 = 852   ml

        t2 = 425c + 273 =698 k

make v1   the subject of the formula ( by   multiplying both side by t1)

  v1=( v2 xt1) / t2

v1= (852 ml   x 588 k)/ 698 k= 717.73 ml