If three half lives have passed since a scientist collected 100 grams of sodium 24 , how much Na-24 is left now? 0 grams
24 grams
50 grams
12.5 grams
100 grams

You should never redesign your experiment. try and see what in your experiment you made a mistake on or try and test your experimemt with somebody else. see if they get the right results.

Atransverse wave (lowest wave) and a the transverse  wave's wavelength .

Volcanoes make new rocks so not ahotspots are the the stuff that makes volcanoes mid atlantic ridge(mar cause i’m lazy) is a constructive plate boundary so it makes sense that new rocks would be found near it, also the mar is in the middle of the ocean so it fits the description deep ocean trench, umm, there’s no ocean trenches to where you’re goingso the mar is most likely the answeri wouldn’t trust me but hey why not