As we go up, the pressure and density of air goes on decreasing. A Partially filled pen leaks when taken to a higher altitude because the pressure of air acting on the ink inside the tube of the pen is greater than the pressure of the air outside.
As the water evaporates from the open surface of a pond, heat is taken away in the process, leaving the surface cool.
As far as scientists can tell, all dinosaurs nested and laid eggs. From these eggs, their babies hatched. Hundreds of sites with fossil eggs of different dinosaurs have been found all over the world, including in the United States, France, Mongolia, China, Argentina, and India. The largest dinosaur egg fossil found is about 12 inches (30 centimeters) long and 10 inches (25 centimeters) wide, and may have weighed 15.5 pounds (7.0 kilograms). Scientists think the egg came from a giant, 100-million-year-old dinosaur called a Hypselosaurus. This is more than twice the size of the eggs of the modern African ostrich, which can lay eggs up to 6 inches (15 centimeters) long and 5 inches (13 centimeters) wide. The smallest fossilized egg found so far came from a Mussaurus; it measures about 1 inch (2.5 centimeters) long.
Water, which is heavier than petrol, slips down permitting the petrol to rise to the surface and continue to burn. Besides, the existing temperature is so high that the water poured on the fire evaporates even before it can extinguish the fire. The latter is true if a small quantity of water is poured.
The British custom of driving on the left was passed down from the Romans. The chariot driver stayed to the left in order to meet an approaching enemy with his right sword hand. Americans switched to driving on the right because on covered wagons, the brakes were built on the left, forcing the driver to sit on that same side and, consequently, to drive on the right so they could have a clear view of the road.
No, it is not a state or a part of any state. The District of Columbia, or D.C. for short, is a district in the national capital, Washington, D.C. The district, named after explorer Christopher Columbus, sits on the Potomac River on land that once belonged to the state of Maryland. Because the city of Washington—which was named after the nation’s first president, George Washington—covers the entire area, the names “Washington, D.C.” and “District of Columbia” have the same meaning. The area is 69 square miles (178 square kilometers) and a federal district, meaning it is an area reserved as the seat of the U.S. government. So, Washington, D.C. is almost like two cities in one—a federal city with government monuments, buildings, and parks (including the White House, the Capitol, and the Supreme Court), and an everyday city more than half a million people call home.
During the American Civil War, a Colonel Bee set up a crude telegraph line between Placerville and Virginia City by stringing wires from trees. The wires hung in loops like wild grapevines, and so the system was called the “Grapevine Telegraph,” or simply “the grapevine.” By the time war news came through the wires it was often outdated, misleading, or false, and the expression “I heard it through the grapevine” soon came to describe any information obtained through gossip or rumour that was likely unreliable.
California, a state on the West Coast of the United States, along the Pacific Ocean, is the third largest state by area and the most populous U.S. state. By 2007, California’s population reached about 37.7 million people, making it the most populated state, and the thirteenth fastest-growing state in the nation. Almost 12 percent of all American citizens live in California.
Norms specially designed to control various risk factors in bank operations
The air inside the tube increases in volume when heated up. As sufficient space for the expansion of the air is not available because the tube is already highly pumped, it may result in bursting of the tyre.