Category: Physics

Is pivot point same as axis of rotation? is that pivot is a thing on which something turns; specifically a metal pointed pin or short shaft in machinery, such as the end of an axle or spindle while axis is (geometry) an imaginary line around which an object spins (an axis of rotation) or is […]

What is the recommended amount of physical activity for children Topic test? Kids and teens should get 60 minutes or more of moderate to vigorous physical activity daily. Toddlers and preschool children should play actively several times a day. Toddlers should get at least 60 minutes active play every day and preschoolers should have at […]

What does a black triangle mean? The Black Triangle. Just as gay men were forced to wear pink triangles in the concentration camps, many lesbians were forced to wear black triangles, which signified that they (like prostitutes and unmarried women of the streets) did not live according to the Nazis’ ideas of correct female behavior. […]

Are peppered moths still black? By 1970, in some polluted regions nearly 99 percent of peppered moths were now black. Still, scientists were puzzled as to how the black moths first came into being. Until now, that is. Researchers in England have traced the difference between a typica and carbonaria moth to a genetic tweak. […]

What type of parenting is most effective? Authoritative parents have been found to have the most effective parenting style in all sorts of ways: academic, social emotional, and behavioral. Like authoritarian parents, the authoritative parents expect a lot from their children, but also they expect even more from their own behavior. How do I fix […]

How do you find the force of one object on another? Force exerted by an object equals mass times acceleration of that object: F = m * a . When one body exerts a force on a second body, the second body exerts a force equal in magnitude and opposite in direction on the first […]

Is April too late for frog spawn? Frogs usually emerge from hibernation at the beginning of March – though in some years they may put in an appearance even earlier – and spawning takes place from March through into April. Why do frogs attach to fish? There are so many that they block up his […]

Why is there a difference between the core and the outer core? The temperature of the inner core is far above the melting point of iron. However, unlike the outer core, the inner core is not liquid or even molten. The liquid outer core separates the inner core from the rest of the Earth, and […]

What is binding energy used for? Binding energy, amount of energy required to separate a particle from a system of particles or to disperse all the particles of the system. Binding energy is especially applicable to subatomic particles in atomic nuclei, to electrons bound to nuclei in atoms, and to atoms and ions bound together […]

What solution turns red litmus blue its pH is likely to be? Base turns red litmus blue and acid turns blue litmus red. Therefore the pH of solution is in base range which is from 7 to 14. Only option D has pH in this range thus the solution having pH 10 turns red litmus […]