Do magnets get stronger if you stack them? Once a magnet is fully magnetised, it cannot be made any stronger as it is fully ‘saturated’. As more magnets are stacked together, the strength will increase until the length of the stack is equal to the diameter. After this point, any further magnets added will provide […]
What is the oldest ice core sample?
What is the oldest ice core sample? The deepest ice core records come from Antarctica and Greenland, where the very deepest ice cores extend to 3 kilometers (over two miles) in depth. The oldest continuous ice core records extend to 130,000 years in Greenland, and 800,000 years in Antarctica. What two events must occur for […]
What sound intensity is defined as the level of pain?
Does without slipping mean no friction?
Does without slipping mean no friction? For many dynamics problems, rolling without slipping means there is a friction force acting on the wheel at the contact point P. This friction force prevents slipping. In this instance the friction is known as static friction since there is no relative sliding between the wheel and surface at […]
What is the value of 1 pico Farad?
What is the value of 1 pico Farad? 1/1,000,000,000,000 What is capacitance value? Capacitance is expressed as the ratio of the electric charge on each conductor to the potential difference (i.e., voltage) between them. The capacitance value of a capacitor is measured in farads (F), units named for English physicist Michael Faraday (1791–1867). A farad […]
Why centrifugal force is called pseudo-force?
Why centrifugal force is called pseudo-force? The centrifugal force is a pseudo-force because if the centripetal force ceased for an object in circular motion, the centrifugal force the body is “feeling” would instantly disappear, and the object would travel tangentially to its line of motion. Can centrifugal force overcome gravity? The centrifugal force is real […]
What happens when a ray of light strikes the surface of separation between the two media at right angle?
What happens when a ray of light strikes the surface of separation between the two media at right angle? What happens when a ray of light strikes the surface of separation between the two media at right angle? When light enters the boundary of two surfaces at right it passes normally without deviation. This is […]
Why is space important?
Why is space important? Space also provides earth with valuable metals, rare objects and precious materials that can be used for medical research. Space is playing a valuable role in saving lives. If NASA stopped exploring our universe, we would not know important facts about space and our solar system. What is a fact about […]
Is Q A joule or kilojoule?
What constellations are visible in both hemispheres?
What constellations are visible in both hemispheres? Constellations such as Orion may be seen in both hemispheres, depending on your distance from the equator and the time of year. If you can’t see the entire constellation, it’s likely too close to the horizon line and are too far north or south for complete viewing. Are […]