<span>well this would be all of them Belarus, Bulgaria, Czech Republic, Hungary, Moldova, Poland, Romania, Russia, Slovakia, and Ukraine.</span>
Answer:
See solution and explanation below
Explanation:
a) From;
N/No = (1/2)^t/t1/2
1/8 = (1/2)^t/1.25 * 10^9
(1/2)^3 = (1/2)^t/1.25 * 10^9
3 = t/1.25 * 10^9
t = 3 * 1.25 * 10^9
t = 3.75 * 10^9 years
b)
N/No = (1/2)^40,110/5,730
N/No = (1/2)^7
N/No = 1/128
percentage remaining after 40,110 years = 1/128 * 100 = 0.78%
c) N/200 * 10^-9 = (1/2)^4.26 * 10^9/0.710 * 10^9
N/200 * 10^-9 = (1/2)^6
N/200 * 10^-9 = 1/64
64 N = 200 * 10^-9
N= 3.125 * 10^-9 g
d) Radiocarbon dating can not be used to determine the age of the solar system since the solar system is as old as the universe and was formed billions of years ago. Radiocarbon dating can only be accurately used to obtain the age of objects of plant or animal origin between 1000 - 10000 years old.
Lake Baringo
Lake Turkana
Lake Magadi
Lake Nakuru
Answer:
It depends, but probably yes
Explanation:
Earth is a great example: there are many places on Earth where the climate falls in "0 to 15 degrees Celsius during winter and 25 to 30 degrees Celsius during summer". It also has an atmosphere, so yes, water may be able to exist on such a planet.
But we also have to consider other factors like the thickness of the atmosphere, what it's made of, what the planet's made of, etc. So while water <em>may</em> exist, there are a plethora of other factors to consider.
It is A, 3.2 million year old bones. Until now, the oldest fossil skeleton of a human ancestor was the 3.2-million-year-old partial skeleton of Lucy, discovered in the Afar depression of Ethiopia, near Hadar, in 1974 and named Au. afarensis.
