What does the elevator do on a plane? An elevator is a primary flight control surface that controls movement about the lateral axis of an aircraft. This movement is referred to as “pitch”. Most aircraft have two elevators, one of which is mounted on the trailing edge of each half of the horizontal stabilizer. What […]
When two variables are correlated one variable causes the other to occur?
When two variables are correlated one variable causes the other to occur? Correlation means that there is a relationship between two or more variables (such as ice cream consumption and crime), but this relationship does not necessarily imply cause and effect. When two variables are correlated, it simply means that as one variable changes, so […]
What are three conditions needed for thunderstorms to form?
What are three conditions needed for thunderstorms to form? There are three basic ingredients needed for thunderstorm development: moisture, an unstable atmosphere, and some way to start the atmosphere moving. What causes severe thunderstorms to form? Thunderstorms form when warm, moist air rises into cold air. The warm air becomes cooler, which causes moisture, called […]
Is friction opposite to velocity?
Is friction opposite to velocity? Direction. Kinetic friction is always directed opposite to the direction of the velocity of the object measured relative to the surface (i.e. in the reference frame moving with the surface). Does the force of friction depend on velocity? Friction is independent of the area of contact so long as there […]
What are proteins the building blocks for?
What are proteins the building blocks for? protein: building blocks When we eat protein, our body breaks these large molecules down into smaller units called amino acids. These building blocks are used for many important functions in the body, including growth and repair of muscle, connective tissue and skin. What are the major functions of […]
Is lactose and glucose the same?
Is lactose and glucose the same? Lactose is a sugar found in milk. It is a disaccharide made up of glucose and galactose units. It is broken down into the two parts by an enzyme called lactase. Once broken down, the simple sugars can be absorbed into the bloodstream. Is glucose better for you than […]
What is a relief profile?
What is a relief profile? A topographic profile or topographic cut is a representation of the relief of the terrain that is obtained by cutting transversely the lines of a topographic map. Each contour line can be defined as a closed line joining relief points at equal height above sea level. What are relief features? […]
What is the meaning of image is virtual?
What is the meaning of image is virtual? Virtual image refers to the image which forms when the light rays appear to meet at definite point, after reflection from the mirror. An erect image is one that appears right-side up. An erect image is formed by the actual intersection of rays. It is an image […]
What happens to excess vitamins in the body?
What happens to excess vitamins in the body? When taken in excess, water-soluble vitamins are removed from the body through urine. Vitamins A, D, E, and K, the fat-soluble vitamins, bind to fat in the stomach and are then stored in fatty tissues and the liver. Can taking too many vitamins hurt your kidneys? But […]
How does stream erosion occur?
How does stream erosion occur? Erosion by Runoff Gravity causes the water to flow from higher to lower ground. Much of the material eroded by runoff is carried into bodies of water, such as streams, rivers, ponds, lakes, or oceans. Runoff is an important cause of erosion. That’s because it occurs over so much of […]