Answer:
D
Explanation:
the total speed and the total mass of the entire system remain the same weather one object is moving or stationary.
When two or more objects collide, the collision does not change the
total momentum of the two objects.
Whatever momentum is lost by one object in the collision is gained
by the other. The total momentum of the system is conserved.
Answer:
there are 25 kg objective travelling at 2m/s to the right.
I think the answer is c because the rest are false
Answer:
When charged particles from the sun strike atoms in Earth's atmosphere, they cause electrons in the atoms to move to a higher-energy state. When the electrons drop back to a lower energy state, they release a photon: light. This process creates the beautiful aurora, or northern lights.
Explanation:
For energy released from vaporisation,
Q(Energy) = m(mass of vapour) X l (latent heat of vaporisation)
= (0.65) X (2257)