PLEASE Which list places the three types of radiation in order from the one that is most difficult to block to the one that is easiest to block?
A. Gamma, alpha, beta
B. Alpha, beta, gamma
C. Alpha, gamma, beta
D. Gamma, beta, alpha

Explain why electric current cannot exist if a current doesn't have a voltage source.

What is the gravitational attraction between a dating couple whose centers of mass are 0.630 m apart if the boy weighs 715 n and the girl weighs 465 n?

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.