Which organism has a nerve net? a fish b hydra c flatworm d sponge

In the 1800s, one of the statements in john dalton's atomic theory was that atoms are indivisible. later experimental evidence led to the discovery of subatomic particles such as neutrons, electrons, and protons. what happened to the indivisible atom part of dalton's atomic theory, and why?

According to coulomb's law, how would the electrical force between particles change if the product of their electrical charge increased?

How heavy is thanos? a) 3000 lbs b) all of it c) the price of tea in china d) heavy enough