Questions

Depending upon the increase or decrease in price rates, buyers may respond accordingly. Some buyers may assume that quality of the product may have reduced to to reduction in price or that the company may not be selling the product as per expectations. The other assumption that buyers may make is that prices may go down in the future and so may delay purchase. On the other hand increased price may lead to a decrease in demand as the product may be more costly for the consumers who may switch to another seller offering similar products at lower prices.

China has been by far the biggest coal producing country over the last three decades. The country produced about 3.6 billion tonnes (Bt) of coal in 2012 accounting for over 47% of the world's total coal output.

The International Day of Happiness (known as Happiness Day) is celebrated throughout the world on the 20th of March. The International Day of Happiness was founded on June 28, 2012, by the United Nations General Assembly when all 193 member states unanimously adopted UN resolution 66/281.

It was celebrated for the first time in 2013.

The main excretory organs of insects and spiders are Malpighian tubules.