Answer:
After three half-lives, it is 7:1
Explanation:
- The rate at which the decay of the radioactive isotope is said to be half-life and is represented as the half-life of the atoms and the matter to disintegrate itself.
- The two radioactive isotopes are K 40 and Ar 40. After the K-Ar dating, they contain minerals such as the clay mica and the temphra minerals and Half-life of the K 40 is 1.3 more than 100,000 years i.e 10x9 years for Ar 40.
- <u>Thus the K 40 has to divide as three half-lives have passed if the ratio of argon to potassium atoms is 7:1. At the end of one half-life, the ratio of the number of argon to potassium atoms is 1:1. and two half lives its 3:1 thus after the third half-life it becomes as 7:1.</u>
the average story is 10 feet and the car is below ground so it would be negative. i assume the answer would be -20 feet
Answer:
The answer is below
Explanation:
A kite is a quadrilateral (has four sides and four angles) with two pairs of congruent adjacent sides.
From the image we can see that one pair of congruent side has be formed with a length of 30 feet. Therefore the amount of rope that has been used is 60 feet and 40 feet (100 - 60) of rope would be remaining to complete the kite. Hence 40 feet of rope would be used to make the other pair of adjacent side.
This means that the remaining pair of adjacent side would be 20 feet each so that all the roe would be used.
Answer:
A. and is likely the basis for the Epic of Gilgamesh and the biblical epic of Noah's Ark.
Explanation:
These are two common stories about the great flood. They were also similar circumstances.
Mediterranean water flowed into the Black Sea through its single connection: the Bosporus Strait.
The Mediterranean water that does inflow mixes with fresher Black Sea water, and as its salinity and density decreases, the Mediterranean water forms plume-shaped features. These plumes flow away from the mouth of the strait and descend until their density matches that of surrounding waters, usually at depths of 100 to 600 meters.
This creates some sort of stormy environment, which is reminiscent of the two religious stories.
Answer:
Option: D. It cooled very slowly.
Explanation:
Iceland is known as the Land of Fire. The country is present in the plate boundary of the North American and Eurasian tectonic plates. Being on the top of the Ring of Fire, it has active volcanoes. Hexagonal basalt columns formed from a volcanic eruption. Basalt columns are the result of a cooling process that changes the appearance of the lava. Basalt is a volcanic rock rich in iron and magnesium created from the heated magma that emerges as lava during an eruption.
The photograph given below is from Icelandic national park Jokulsargljufur.
