Macroeconomics is a branch of economics that studies how the aggregate economy behaves. A variety of economy-wide phenomena is examined such as, inflation, price levels, rate of growth, national income, gross domestic product (GDP), and changes in unemployment.
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<span>The two main groups to immigrate during this time were the Irish and British. The Irish bitterly resented the British who ruled Ireland. Many rented from British landlords who treated them as second class sub-citizens. It was densely populated, and suffered from intense economic hardship. Aside from political persecution, the Irish economy depended heavily on the potato crop which was wiped out by potato blight.
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Answer:
b) electrons jump onto or off the neutral ball when a charged object comes close
Explanation:
What causes a pithball to move is when "electrons jump onto or off the neutral ball when a charged object comes close".
The pithball electroscope is actually used to test if a body is charged or not. When a charged body is brought near the pithball, the ball moves. The movement of that charged body reveal that there are electrons it is carrying.
The pithball can actually be charged. It is charged by touching a charged object to it. This leads to some of the charges on the surface of the charged object moving to the surface of the ball. The pith-ball electroscope was invented by John Canton, a British schoolmaster and physicist in 1754.
