Answer:
1st) Sagittarius Dwarf Elliptical Galaxy
2nd) Virgo Stellar Stream
3rd) Canis Major Dwarf
4th) Milky Way Galaxy
Explanation:
We have a mass of 200g (0.2kg) moving at 20m/s
Kinetic Energy KE = ½ mv^2 where m is mass and v is velocity
Actually, v is a vector quantity, so KE = ½ mv•v
The dot product of 2 vectors a and b is abCosθ where θ is the angle between the vectors.
Obviously v•v = v^2 Cos0 = v^2
In this case, we have KE = ½ (0.2)(20^2) = 40kg-m^2/s^2 = 40J
So we have kinetic energy in the amount of 40 Joules.
Answer:
Lions need to blend in their surrounding, but cows don't. ... What adaptation helps a camel to survive in the desert?
Explanation:
Answer:
The body has two lines of natural defense to protect against infection. The first are physical barriers, such as the skin, body secretions and mucous membranes. The second line of defense is the immune system. Specialized immune cells coordinate and execute attacks to kill germs that make it past the body's physical barriers.
