Author Question: The astronauts feel weightless in the International Space Station, which orbits the Earth once every ... (Read 72 times)

ENagel · **on:** Jul 27, 2018

The astronauts feel weightless in the International Space Station, which orbits the Earth once every 90 minutes. Why?

A) because they are moving so fast
B) because the gravity from the Moon cancels out the gravity from Earth
C) because they and the space station are both falling around the Earth
D) because there is no gravity in space

Question 2

What happens when the gravity of a massive star is able to overcome neutron degeneracy pressure?

A) Gravity is not able to overcome neutron degeneracy pressure.
B) The core contracts and becomes a black hole.
C) The core contracts and becomes a white dwarf.
D) The star explodes violently, leaving nothing behind.
E) The core contracts and becomes a ball of neutrons.