$8$ A comet orbits the sun in a highly elliptical orbit. Does the comet have a constant $($a$)$ linear speed, $($b$)$ angular speed, $($c$)$ angular momentum. $($d$)$ kinetic energy. $($e$)$ potential energy. $($f$)$ total energy throughout its orbit? Neglect any mass loss of the comet when it comes very close to the Sun.

Which of the following symptoms is likely to affict an astronaut in space $($a$)$ swollen