four point charges are kept at the corners of a square of side 0.02 metre find the magnitude of electric field at the centre of the square if Q is equal to 0.02​

Simple machines can a. increase force only b. decrease force only c. increase or decrease force

Select light for the type of wave, adjust the wavelength so that the light is red, and increase the amplitude of the light to the max. then, select the start button at the source location to begin producing the waves. light is a form of electromagnetic wave, containing oscillating electric and magnetic fields. the wave amplitude detector mentioned above shows how the electric field oscillates in time at the location of the probe. the amplitude of the wave at the location of the probe is equal to the maximum electric field measured. how does the amplitude of the wave depend on the distance from the source?

When flexing to a reflective style, one should be specific, brief and to the point, and maintain a fast and decisive pace?