Category: Physics

What does discoloration of Apple mean? When an apple is cut (or bruised), oxygen is introduced into the injured plant tissue. When oxygen is present in cells, polyphenol oxidase (PPO) enzymes in the chloroplasts rapidly oxidize phenolic compounds naturally present in the apple tissues to o-quinones, colorless precursors to brown-colored secondary products. What is the […]

Does electric field go from positive to negative? Capacitors and Electric Fields The electric field points from the positive to the negative plate- left to right. The electric field points in the direction of the force that would be on a positive charge. An electron will move in the opposite direction of the electric field […]

Does orange juice have a lot of sugar? Summary Orange juice is high in sugar and calories, which may contribute to weight gain and high blood sugar. Drink it in moderation and opt for fresh-squeezed or 100% orange juice whenever possible. How many calories are in an 8 ounce glass of orange juice? 100% Juice […]

Will iPhone 4S work in 2020? You can still use an iPhone 4 in 2020? Sure. Apps are WAY more CPU-intensive than they were back when the iPhone 4 was released. And this, as well as the phone’s limited specs, makes for sluggish performance and dire battery life. How much did an iPhone cost in […]

What is the purpose of gravity? Earth’s gravity is what keeps you on the ground and what causes objects to fall. Gravity is what holds the planets in orbit around the Sun and what keeps the Moon in orbit around Earth. The closer you are to an object, the stronger its gravitational pull is. Gravity […]

Which alcohol is most readily oxidized? Primary alcohol gets easily oxidized to an aldehyde and can further be oxidized to carboxylic acids too. Secondary alcohol gets easily oxidized to ketone but further oxidation is not possible. Tertiary alcohol doesn’t get oxidized in the presence of sodium dichromate. Is oxidation of alcohol reversible? All reactions are […]

Is witch hazel actually bad for your skin? Overall, witch hazel is proven as safe for the skin. The caveat is that witch hazel, like anything else applied to your skin, may not work for everyone. If you’re trying out witch hazel for the first time, it’s a good idea to test it out in […]

What is the formula for energy change? To calculate an energy change for a reaction: add together the bond energies for all the bonds in the reactants – this is the ‘energy in’ add together the bond energies for all the bonds in the products – this is the ‘energy out’ Is cooking an egg […]

What force causes the deflection of wind in different hemispheres? Because the Earth rotates on its axis, circulating air is deflected toward the right in the Northern Hemisphere and toward the left in the Southern Hemisphere. This deflection is called the Coriolis effect. What is the direction of the winds between 30 60 degrees? The […]

Why are condos more expensive than coops? Condo prices are higher than co-ops, but co-ops require a larger downpayment, higher monthly fees, and a lengthy approval process. Condos generally allow subletting of the apartment, while only some co-ops allow subletting, and the rules are complex. Which would not be a major difference between a coop […]