Answer:
3
Explanation:
half life, T = 12 million years
total life, t = 36 million years
Let n be the number of half lives.
n = Total life / half life
n = 36 / 12 = 3
So, the number of half lives are 3.
Answer:
A system that includes the stone and the earth.
Explanation:
If the system of being dropped from the height of the cliff consists of just the stone alone, then it means that its momentum will certainly undergo changes as it falls freely. However, If the system is now expanded to include not only the stone but also the Earth, then it implies that the momentum of the stone which is in the downward direction will be equal and opposite to the momentum of the Earth in the upwards direction towards the stone. Therefore, the momentum will cancel out and net momentum will be zero.
30 km/h * 17 h = 30*17 km/h *h
= 510 km
Answer:
Endorphins
Explanation:
They are realeased in responce to stress or pain in the body
I'm not sure if this was exactly what you were looking for but hope it helped.
Considering the total body, there are six elements of fitness: aerobic capacity, body structure, body composition, balance, muscular flexibility and strength