During world war i, germany used a "big bertha" cannon to hurl shells into paris 30 miles away. this gun also had a long barrel. what is the reason for using a long barrel in these guns

Why did some people support supply-side economics and others opposed it? it addressed the supply of goods and ignore demand. it called for large tax cuts for the wealthy. forigen production played a significant role in the plan. the program called for increased government spending.