Which of the following best describes the formation of plasma?
a) plasma forms when a gas reaches extremely low temperatures and freezes into a solid.
b) plasma forms when the kinetic energy of a gas decreases, and the particles become ionized.
c) plasma forms when the kinetic energy of a gas increases and intermolecular forces cause particles to move closer together.
d) plasma forms when a gas reaches extremely high temperatures, and electrons are released from the atoms.

organisms are more likely to be more preserved in mud than sand because mud is moist and wet, while sand is very dry.

(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