Amy because she is lighter, so the more force will be put on her
Answer:



Explanation:
From the question we are told that
Electric field of intensity 
Rectangle parameter Width
Length 
Angle to the normal 
Generally the equation for Electric flux at parallel to the yz plane
is mathematically given by



Generally the equation for Electric flux at parallel to xy plane
is mathematically given by



Generally the equation for Electric flux at angle 30 to x plane
is mathematically given by




Answer:
The driving force for (a) heat transfer is temperature difference. (b) electric current is voltage difference. (c) fluid flow is pressure or hydraulic head difference.
Explanation: (a) The driving force for heat transfer is temperature difference. Heat transfer between two mediums is possible only if the two mediums are at different temperature, the higher the temperature, the higher the heat transfer.
(b) The driving force for electric current is voltage difference. Voltage difference is defined as the potential difference in charge between two points in electrical field. For electric current to occur,the voltage must be high.
(c) The driving force for fluid flow is pressure difference or hydraulic head difference. For fluid to move upward,it requires energy.
Sound level at distance of 15 m is given as 20 dB
so intensity at this distance is given as



now if we move closer to some some distance the sound level is now 50 dB
now the intensity is given as



now we know that



so now the distance from friend must be 47 cm