first 421÷ by pi
then the answer divided by 2
you divide the answer by 2 to find the radius because the radius is half the diameter
I would say that in very fast moving water such as in a river, the cobble size could be transported because cobbles are 64-256mm so are quite big and in a quiescent stream won't move much but in a freshet say in a steep mountain stream they can be rolled along such as I observed in the local streams at a mining town during the Hurricane Fifi in Honduras in 1974.
Answer:
sudden and quicker
Explanation:
The climate on Earth has always been changing, and there are numerous factors that have had their influence on it. Some of the factors are the plate movement and the astronomical causes. Both of these factors though result in gradual changes of the climate, which can take thousands or even millions of years in order to have a significant change. The volcanic eruptions are another story. They are also one of the factors that influence the climate, but unlike the other two factors that are mentioned, the volcanic eruptions cause sharp and sudden climate changes. If the volcanic eruption is massive, or there are several volcanoes around the world erupting at the same time, they are able to change the global climate in just few days. Usually it is the enormous amounts of ashes and other particles released in the atmosphere that are blocking the sunlight and cause sudden cooling of the planet.
You need physical map to check the amazon river
Since it is on a tilt, the sun can only reach a certain amount of the earth at one time. Which is why if it’s day time in one country, on the other side of the world it’s night time
