Category: Physics

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? 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? 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 […]

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 […]

What does the 2 stand for in li2o? The ionic formula for Lithium Oxide is Li2O . This makes oxygen a O−2 anion. Ionic bonds form when the charges between the metal cation and non-metal anion are equal and opposite. This means that two Li+2 cations will balance with one O−2 anions. What is the […]

What is the pH level of a banana? 4.50 – 5.20 What fruit has the highest pH? Here are the 13 most acidic fruits and their pH value as observed by the Clemson University: Lemon Juice (2.00 – 2.60) Limes (2.00 – 2.80) Blue Plums (2.80 – 3.40) Grapes (2.90 – 3.82) Pomegranates (2.93 – […]

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? 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 […]

Should you lean forward while skiing? You only need to lean forwards enough to put your centre of gravity over the middle of the ski. The reason that this has become a myth is that one of the most common mistakes made by people learning to ski, is that they lean back, and that instructors […]

Which planet has the greatest eccentricity? Mercury How is Earth’s eccentricity calculated? The formula to determine the eccentricity of an ellipse is the distance between foci divided by the length of the major axis. What is the maximum allowed value for eccentricity? 0.057 Is Earth’s orbital eccentricity large or small? The eccentricity of Earth’s orbit […]