Answer:
B) The lighter gases boiled off of the protoplanets closest to the sun, leaving dust and metals behind to form the inner planets.
Explanation:
Inner planets are smaller and rockier than outer gas planets,outer planets are larger,because of their lower gravity they don't attract extreme amounts of gas in their planets.The four outer planets were so far from the Sun that its winds could not blow away their ice and gases
A bullet of 5 gm is fired from a pistol of 1.5 kg. If the recoil velocity of pistol is 1.5 m/s,
find the velocity of bullet.
Answer:
-450 m/s
Explanation:
Momentum is conserved.
p₀ = p
0 = (1.5 kg) (1.5 m/s) + (0.005 kg) v
v = -450 m/s
compare magnetic properties of iron and steel
Answer: Iron and steel are two separate metallic elements.
Explanation:
The following are the differences between magnetic properties of iron and steel.:
1. Iron get magnitized quickly under the influence of magnetic field whereas the steel magnitized slowly.
2. The iron looses its magnitism when magnetic field is removed but steel retains the magnitism for long when magnetic field is removed.