After three half-lives, one-ninth of an original radioactive parent isotope remains, and eight-ninths has decayed into the daughter isotope.
a. true
b. false
b. false
You might also like to view...
You slowly rub your wet finger around the thin rim of a wine glass while you hold its base firmly to a tabletop with your other hand. The resulting sounds illustrates
A. forced vibrations. B. forced vibration and resonance. C. diffraction of sound. D. interference of sound.
The boundaries of a voting district are drawn in order to give a group of voters an unfair advantage. This is ________
What will be an ideal response?
The farm machinery that opens a furrow through the soil and mulch of dead weeds, drops seeds and fertilizer and then closes the furrow is engaged in the erosion-reducing technique of
A) creating shelterbelts and chemically fertilizing the soil. B) creating strip cropping in one operation. C) no-till planting. D) organic pest control.
On the hypothetical Daisy World planet, black daisies would be favored over white daisies during
A. cold times because of black daisies' low albedo. B. hot times because of white daisies' low albedo. C. cold times because of black daisies' high albedo. D. hot times because of white daisies' high albedo.