Ignoring reflection at the air-water boundary, if the amplitude of a f=1.1ghzf=1.1ghz incident wave in air is v0=15v/mv0=15v/m at the water surface, determine the depth that make the electric field down to vmin=2μv/vmin=2μv/my. water has μr=1μr=1 and at 1.1ghz 1.1 ghz, εr=70εr=70 and σ=1.5s/mσ=1.5s/m.

The membrane surrounding a living cell consists of an inner and an outer wall that are separated by a small space. assume that the membrane acts like a parallel plate capacitor in which the effective charge density on the inner and outer walls has a magnitude of 7.0 × 10-6 c/m2. (a) what is the magnitude of the electric field within the cell membrane? (b) find the magnitude of the electric force that would be exerted on a potassium ion (k+; charge = +e) placed inside the membrane.

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Decreased sensitivity to an unchanging stimulus is known as