Which scientist was the first to conclude through experimentation that atoms contain most of their mass in a small, dense nucleus?

Why doesn't heat added to water make the tempature rise above 100c

Skills of homo sapiens were found an excavation. the skulls were preserved because the bodies were frozen. so, these fossils are (blank) fossils.the image shows the evolution of skulls beginning 2 to 3 million years ago. based on the image, modern human skulls(blank) ape skulls.

What mass of natural gas (ch4) must you burn to emit 276 kj of heat?