Which of the following may happen to astronauts when they return to Earth from space? (1 point) a
They may feel dizzy because the flow of blood to and from the heart to the brain is affected in space.

b
They may feel dizzy because the heart pumps more blood per beat on Earth than in space.

c
Their heart rate may slow down because there is more blood to circulate around the body.

d
Their heart rate may slow down because there is less blood to circulate around the body.

mechanics (greek   is that area of science concerned with the behaviour of physical bodies when subjected to forces or displacements, and the subsequent effects of the bodies on their environment. the scientific discipline has its origins in ancient greece with the writings of aristotle and archimedes[1][2][3] (see history of classical mechanics and timeline of classical mechanics). during the early modern period, scientists such as galileo, kepler, and newton laid the foundation for what is now known as classical mechanics. it is a branch of classical physics that deals with particles that are either at rest or are moving with velocities significantly less than the speed of light. it can also be defined as a branch of science which deals with the motion of and forces on objects. the field is yet less widely understood in terms of quantum theory.

explanation:

since electrons are negative the answer is neagtaive

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the atomic number of carbon is six, which means that a carbon atom has six protons. carbon has three naturally occurring isotopes: carbon-12, carbon-13, and carbon-14. which of these statements are true about carbon and its isotopes? select all that appl