Which is the best approximation of the density a buoy would need to be to test water conditions at a depth of 3000 meters?

the correct choice is a .

do not post any more test or exam questions on

what experimental evidence led scientists to change from the previous model to this one?

a few of the positive particles aimed at a gold foil seemed to bounce back.

the colors of light emitted from heated atoms had very specific energies.

experiments with water vapor showed that elements combine in specific proportions.

cathode rays were bent in the same way whenever a magnet was brought near them.

float.

archimedes' principle

denser than water sinks in water.

denser than mercury would sink in it