Athin plastic rod of length 2.8 m is rubbed all over with wool, and acquires a charge of 88 nc, distributed uniformly over its surface. calculate the magnitude of the electric field due to the rod at a location 15 cm from the midpoint of the rod. do the calculation two ways, first using the exact formula for a rod of any length, and second using the approximate formula for a long rod.

Could we see a galaxy that is 20 billion light-years away?

Matter that emits no light at any wavelength is called

Which sentences describe point source pollution? in this type of pollution, the source of the pollution is single and easily identifiable. when runoff water from the melting of snow mixes with debris, it creates pollution. the runoff water, mixed with pollutants, reaches large areas with disastrous effects. alternatively, when a wastewater treatment plant releases harmful chemicals into a stream, the chemicals pollute the stream water because they are not treated for safety.