According to the principle of , all participants must know what their participation will involve and what risks might develop.

According to social exchange theory, altruistic behaviors benefit the individual who performs them.

Mixing salt in water is an example of physical change

Neurons are components of the nervous system of the body that transmit signals as electrical impulses travel along their length. these impulses propagate when charge suddenly rushes into and then out of a part of the neutron called an axon. measurements have shown that, during the inflow part of this cycle approximately 5.6x10^11 na per meter, each with a charge of e enter the axon. how many coulombs of charge enter a 1.10 cm length of axon during this process