Category: Physics

How do you know if correlation is positive or negative? We often see patterns or relationships in scatterplots. When the y variable tends to increase as the x variable increases, we say there is a positive correlation between the variables. When the y variable tends to decrease as the x variable increases, we say there […]

What are 3 uses for lanthanum? Lanthanum and other rare-earth compounds are used in carbon arc lighting, specifically in the film and television industry for studio lighting and projection. Lanthanum oxide (La2O3), also called lanthana, improves the alkali resistance of glass and is used in making camera lenses and in other special glasses. Is scandium […]

What is KF formula? Potassium fluoride is the chemical compound with the formula KF. After hydrogen fluoride, KF is the primary source of the fluoride ion for applications in manufacturing and in chemistry. What factors affect freezing point depression? The freezing point depression constant changes depending on the solvent, and the van ‘t Hoff factor […]

How do you use the star chart app? All you have to do is point your Android device to an area of the sky and watch the app calibrate. For example, is that really the Big Dipper that you’re looking at? Point the phone up to that area of the sky and see if the […]

Can you refuse to have your bags searched? “Bag checks are voluntary. Retailers can only conduct a bag check if you agree. However, if you refuse to allow a check, you may be asked to leave the shop and not return until you agree to a bag check.”` Do you have to stop for Walmart […]

What will the world look like in 1 billion years? In about one billion years, the solar luminosity will be 10% higher than at present. This will cause the atmosphere to become a “moist greenhouse”, resulting in a runaway evaporation of the oceans. As a likely consequence, plate tectonics will come to an end, and […]

Are there 5 or 6 kingdoms? Until recently the system devised by Robert Whittaker in 1968 was widely adopted. Whittaker’s classification scheme recognizes five kingdoms: Monera, Protista, Fungi, Plantae, and Animalia. What are the 3 main domains of life? According to this system, the tree of life consists of three domains: Archaea, Bacteria, and Eukarya. […]

Is apple juice heterogeneous or homogeneous? the apple juice which we get in supermarkets and stores is a homogeneous mixture , as, it does not show the ‘Tyndall Effect’, the particles of apple do not settle down when left undisturbed for a while, there is no visible separation of particles in it, so the particle […]

Is it harmful to stand in front of a microwave? Yes, you can stand a safe distance in front of the microwave. Microwave ovens are designed to keep in radiation. “So you can see through the holes at what’s going on in the oven. But the waves are not actually coming out and cooking you.” […]

Is regulation good for the economy? Regulation can also benefit an economy by enabling competition. Businesses in oligopolistic sectors often complain about the burden of compliance; but they clearly rely on regulation as a barrier to market entry by new competitors. The cost of their regulatory burden is a fee they pay for market power. […]