Scientists can determine the age of ancient objects by themethod of radiocarbon dating. The bombardment of theupper atmosphere by cosmic rays converts nitrogen to aradioactive isotope of carbon, C, with a half-life of about5730 years. Vegetation absorbs carbon dioxide through theatmosphere and animal life assimilates C through foodchains. When a plant or animal dies, it stops replacing itscarbon and the amount of C begins to decrease throughradioactive decay. Therefore the level of radioactivity mustalso decay exponentially.A parchment fragment was discovered that had about74% as much C radioactivity as does plant material onthe earth today. Estimate the age of the parchment.
Unitary Method
The word “unitary” comes from the word “unit”, which means a single and complete entity. In this method, we find the value of a unit product from the given number of products, and then we solve for the other number of products.
Speed, Time, and Distance
Imagine you and 3 of your friends are planning to go to the playground at 6 in the evening. Your house is one mile away from the playground and one of your friends named Jim must start at 5 pm to reach the playground by walk. The other two friends are 3 miles away.
Profit and Loss
The amount earned or lost on the sale of one or more items is referred to as the profit or loss on that item.
Units and Measurements
Measurements and comparisons are the foundation of science and engineering. We, therefore, need rules that tell us how things are measured and compared. For these measurements and comparisons, we perform certain experiments, and we will need the experiments to set up the devices.
Scientists can determine the age of ancient objects by the
method of radiocarbon dating. The bombardment of the
upper atmosphere by cosmic rays converts nitrogen to a
radioactive isotope of carbon, C, with a half-life of about
5730 years. Vegetation absorbs carbon dioxide through the
atmosphere and animal life assimilates C through food
chains. When a plant or animal dies, it stops replacing its
carbon and the amount of C begins to decrease through
radioactive decay. Therefore the level of radioactivity must
also decay exponentially.
A parchment fragment was discovered that had about
74% as much C radioactivity as does plant material on
the earth today. Estimate the age of the parchment.
Trending now
This is a popular solution!
Step by step
Solved in 3 steps
