Think about how each of noise, heat, visible light, radiation and atmospheric shock waves travel. Which ones require air particles to travel?
A vacuum has no air particles within it, it is completely empty.
Therefore, any of the above that requiring particles to travel will not be able to cross it and the observer will not experience it.
Answer:
A.Moving electric charges (electrons in a circuit) creates a magnetic field and
a magnetic field can cause an electric charge to move (electricity).
Explanation:
Answer:
See attached handwritten document for answer
Explanation:
<span>There are several main pieces of evidence that support the Big Bang theory.
One is the fact that the universe is expanding, proven with something
called red shift. The second is something called cosmic microwave
background radiation. The third is the abundance of different elements
in the universe.
</span>
Answer:
= 169 cm
Explanation:
Mass 1 = 45 kg => Force = 450 N
Mass 2 = 29 kg => Force = 290 N
<u><em>According to principle of moments:</em></u>
=> 
Where 
= 450 N, 
= 109 cm and 
= 290 N
=> (450)(109) = 290
=> 49050 = 290
Dividing both sides by 290
=> = 169 cm
