Explain how a pitch ball can be electrified with positive or nehative charge
Answers
Theory:
'pith\ n 1a: a usu. continuous central strand of spongy tissue in the stems of most vascular plants that prob. functions cheifly in storage.
A pith ball is a very small, lightweight object that picks up electric charge quite well. A charged pith ball works well to show the Coulomb force between two charged objects. If a glass rod is rubbed with silk, the silk rubs some electrons off the rod. The rod thus becomes positively charged.
Touching the positively-charged rod to two pith ball gives the balls each a small positive charge. Since like charges repel, the pith balls repel one another.
If an ebonite rod is rubbed with fur, the rod rubs some electrons off the fur. The rod thus becomes negatively charged and attracts the positively-charged pith balls.
Static Electricity 1
Figure 1: Charging a glass rod
Static Electricity 2
Figure 2: Charging the pith balls
Static Electricity 3
Figure 3: Charging a ebonite rod
Apparatus:
Two pith balls hung by string
A glass rod
An ebonite rod
A piece of fur and a piece of silk cloth
Procedure:
Charge up the glass rod with the silk rod first. Then touch both pith balls with the rod. The two balls should now repel one another.
Next, charge the ebonite rod with the fur. Bring the rod close to the balls. You will see the positively-charged balls are attracted to the rod.
Answer:
The Amazon basin is the part of South America drained by the Amazon River and its tributaries. The Amazon drainage basin covers an area of about 6,300,000 km2 (2,400,000 sq mi), or about 35.5 percent of the South American continent. It is located in the countries of Bolivia, Brazil, Colombia, Ecuador, , Guyana, Peru, Suriname, and Venezuela.[1]
Amazon River Basin (the southern Guianas, not marked on this map, are a part of the basin)
The mouth of the Amazon River
Most of the basin is covered by the Amazon rainforest, also known as Amazonia. With a 5.5 million km2 (2.1 million sq mi) area of dense tropical forest, this is the largest rainforest in the world.
Geography
Plant life