What is required for an electric charge to flow through a wire? zero resistance in the wire a balance of electric potential high resistance in the wire a difference in electric potential

It was crowded with sewer like smells. bad sewer systems

I'm pretty sure the answer is c 

Jenny and fred both play a long note on their trombones. a stationary observer hears the sound increasing and decreasing repeatedly in loudness. which of these must be true? the sound waves from the two trombones have slightly different frequencies.the sound waves from the two trombones have the same frequency.the sound waves from the two trombones have slightly different amplitudes.the sound waves from the two trombones have the same wavelength.the sound waves from the two trombones have slightly different velocities.  lolthe answer is          the sound waves from the two trombones have slightly different frequencies.

Biological effects of low exposure to radiation: damage cells.damage dna.are hard to detect.are repaired by the body.biological effects of high exposure to radiation: kill cells, tissues, and organs.produce a variety of cancers.result in acute radiation syndrome.