Answer:Thus we can conclude that these charcoal fragments are about 11460 years old.
Explanation:
a) for completion of half life:
Half life is the amount of time taken by a radioactive material to decay to half of its original value.
Expression for rate law for first order kinetics is given by:
where,
k = rate constant
t = age of sample
a = let initial amount of the reactant = 100
a - x = amount left after decay process = 25
b) for completion of 75 % of reaction
Thus we can conclude that these charcoal fragments are about 11460 years old.
Risk avoidance is the process of applying safeguards to avoid a negative
impact. Risk avoidance
is a risk treatment that removes hazards, activities and exposures that can influence
an organization's assets negatively.
Examples of risk avoidance are business strategy, information security and investing.
The region of the greatest tornado activity shifts northwards from early spring to summer because the cold air reaches the boundary for expansion at the Gulf and as spring approaches, the days grow longer which allows for more heating from the sun. When this happens the temperatures on the ground will typically go up, and the warm, moist air from the Gulf of Mexico will push the cold air back up. During this time of activity the region for this sever weather area will move eastward around the southeastern Atlantic states. During this time the southeastern Atlantic states will have a peak of activity around April. When the spring air advances, the region for tornado activity will gradually shift to the west and will eventually then move northward.<span />
Sweat evaporates to cool down the area of the sweating. If the ground, or the bobcat in general, is hot, it's paws can sweat to cool down that area.
C. Alfred Hershey and Martha Chase