Why do some scientists believe the exosphere should not be considered a part of the atmosphere? a. it has virtually no gases from the earth in it. b. the atmosphere already has numerous layers. c. without molecules, there is no ability to retain heat. d. many of the sun's ultraviolet rays reside in this layer.

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