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.

answer

the ions in solute supperate from eachouthere

(newtons first law)

conservation of momentum law states :

momentum before collision = momentum after collision

momentum p (kg-m/s)= mass * velocity

say moving car=1 000 kg, velocity = 10 m/s then p = 1 000*10= 10 000 kg-m/s

say still car = 2 000 kg, velocity = 0 m/s then p = 2 000* 0 = 0 kg-m/s

total momentum prior to collision = 10 000 + 0 = 10 000 kg-m/s

momentum after collision = 10 000 kg-m/s

mass now = 1 000 kg+2 000 kg = 3 000 kg

10 000 = 3 000 kg* velocity m/s

10 000/3 000 = velocity

3.33 m/s = velocity after collision

an impulse is a force applied over time , momentum is exclusive of external forces and a perfect collision is implied