Answer:
The mystery that Greene discusses is that dark energy is causing the expansion of the universe to accelerate. However, this cannot be explained by the laws of Physics.
Explanation:
I majored in Physics
<span>Physicists use certain units to measure heat energy and electrical energy:
- Joule (Watt sec )
- Watt - hour
- Kilowatt- hour
- Calorie
Hope this helps!
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On half life is 5370 years; 6 half lives have passed. You just multiply,
5370*6 = 32,220 years
Speed= distance/time
Speed= 170/230
Speed=0.74 m/s
