How do people eat in space? Astronauts mainly drink water while in space, but flavoured drinks are also available. Freeze-dried drink mixes such as coffee or tea, lemonade and orange juice are provided in vacuum sealed pouches. The astronauts then add water to the beverage pouch through the pressurised hose and suck the drink through […]
What lives in a salt marsh?
What lives in a salt marsh? Composed of fine silts and clays, mud flats harbor burrowing creatures including clams, mussels, oysters, fiddler crabs, sand shrimp, and bloodworms. Salt marshes are salty because they are flooded by seawater every day. They are marshy because their ground is composed of peat. How do humans impact salt marshes? […]
What are the elements of circle?
What are the elements of circle? Important Circle Parts Radius: The distance from the center of the circle to its outer rim. Chord: A line segment whose endpoints are on a circle. Diameter: A chord that passes through the center of the circle. Secant: A line that intersects a circle in two points. How do […]
What is the concept of black body?
What is the concept of black body? Blackbody, also spelled black body, in physics, a surface that absorbs all radiant energy falling on it. The term arises because incident visible light will be absorbed rather than reflected, and therefore the surface will appear black. What is the absorptive power of a black body? For a […]
How high are waves in the middle of the ocean?
How high are waves in the middle of the ocean? 5m height (so 10m peak to valley) is quite common, but since there are many different sized waves traveling at different speeds, sometimes they come together and you get a brief but very large wave. These “rogue waves” can reach 20-30m in height. What is […]
When the economy is at full employment the unemployment rate is zero?
When the economy is at full employment the unemployment rate is zero? Full employment does not mean zero unemployment, it means cyclical unemployment rate is zero. At this rate, job seekers are equal to job openings. This is also called the natural rate of unemployment (Un) where real GDP is at its potential GDP. When […]
How do humans use radiant energy?
How do humans use radiant energy? Heat created by the body can be radiant energy. A surface heated by the sun converts the energy of the light into infrared energy which is a form of radiant energy. Cell phones utilize radiant energy to function. Magnetic motor generators that utilize neodymium magnets create radiant energy. What […]
What happens when things are heated differently?
What happens when things are heated differently? When heat is added to a substance, the molecules and atoms vibrate faster. As atoms vibrate faster, the space between atoms increases. The motion and spacing of the particles determines the state of matter of the substance. The end result of increased molecular motion is that the object […]