A tire rotates 50 times in 2.5 seconds what is its period?

What color would an object that reflects green and blue light appear to be in white light? a. blue b. cyan c. magenta d. black

What was the first instrument to ever record an earthquake?

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.