New York, New York City is a popular state
Pittsburgh, Pennsylvania
Boston, Massachusetts
Portland, Maine
Manchester, New Hampshire
Plymouth, Massachusetts
Philadelphia, Pennsylvania
and in my opinion, I think this is to most popular
Headlines The headlines helps me getting attracted by the news
Subtitile- The subtitle helps to get to know the main plot of the news
Opening Paragraph- The opening paragraph tells me what is basically happened or gives me a short blurb of the whole news
Answer:
B and C
Explanation:
B. In a given rock sample, the amount of Silicon-32 isotopes gets divided in half about every 170yrs.
This is the concept of half-life. Half life is the time take for half of a radioactive isotope to disintegrate. The shorter the half life the faster the isotope disintegrates.
From the question, we were told that it would take 170yrs for half of the isotope of Silicon to disintegrate to Phosphorus. This is the half life.
C. The half life can be used to determine the amount of Si-32 that has decayed from the time closure temperature was reached.
The closure temperature is very important in radioactivity. It is the temperature at which a system has cooled and there is no resulting disintegration of parent and daughter isotopes.
From first order kinetics, we know that the rate at which radioactive elements decay at any time is directly proportional to the number of radioactive atoms present. A knowledge of the half life helps to figure out the number of atoms that has decayed in time.
Answer:
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Explanation:
Characteristically, Command Economies are bad when it comes
to a person interested in making a profit; this is because they
typically center on economic equality and do not have economic efficiency. Speaking
in general, in a command economy, the allocation of resources is done by a
Central Planning Committee, and this system usually leads to quite a number of
shortages and/or surpluses in products since the demand/supply can be impulsive.<span> On the other hand, Market Economies are centered on profit-making
and Economic Efficiency.</span>
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Essentially, how well resources are distributed among the
public will determine how well people will be rewarded. Let’s take for instance,
a parking lot like downtown; characteristically, a market economy will likely focus
on how to place as many cars as possible in the lot and how to use the space to
its full capacity, while a Command will most likely try to apportion the space
so that (just for example) 3 small, 3 medium and 3 large vehicles are parked (economic
equality).
<span>
<span>Finally, with a market economy, there is likely to
to be less shortages and less surpluses, since it works with the Law of Supply
and Demand in which an equilibrium price will be automatically established
through buying and selling.</span></span>
