Category: Physics

What is the angle of refraction if the angle of incidence is 30 degree? The angle of refraction is 19.27°. Explanation: This can be determined using Snell’s law which states: Refractive index = sin i/sin r ( where i is the angle of incidence and r is the angle of refraction). What does Snell’s law […]

What grade is a 67%? Percent Letter Grade 70 – 72 C- 67 – 69 D+ 63 – 66 D 60 – 62 D- Is 70 an A or B? Letter Grade Percentage Range Mid-Range A 80% to 89% 85% B+ 75% to 79% 77.5% B 70% to 74% 72.5% C+ 65% to 69% 67.5% […]

Is a 9 pound bowling ball too light? A bowling ball should weigh 10 percent of your body weight (up to 16 pounds), which means you really shouldn’t be grabbing, say, an 8-pound ball if you weigh 150 pounds. You want some weight to the ball, but it shouldn’t be so heavy that it’s uncomfortable. […]

What are the benefits of delayed gratification? Why is delayed gratification important? The ability to hold out now for a better reward later is an essential life skill. Delayed gratification allows you to do things like forgo large purchases to save for a vacation, skip dessert to lose weight or take a job you don’t […]

What was the world population in 1930? 2 billion What would cause an increase in the population? According to Wikipedia, “Overpopulation occurs when a species’ population exceeds the carrying capacity of its ecological niche. It can result from an increase in births (fertility rate), a decline in the mortality rate, an increase in immigration, or […]

What are the three terms of categorical syllogism? A categorical syllogism infers a conclusion from two premises. It is defined by the following four attributes. Each of the three propositions is an A, E, I, or O proposition. The subject of the conclusion (called the minor term) also occurs in one of the premises… What […]

Can a duck kill you? Ducks, unlike their close relative swans, which are bigger and have a number of documented attacks on humans, appear to be relatively harmless. Resnick drowned in an extraordinarily rare case of a duck causing a person’s death. What does it mean when a duck comes in your yard and stays? […]

What is a 90 14 needle used for? 90/14 – suitable for medium weight fabrics, e.g. slightly heavier weight cotton, polyester, linen, lightweight upholstery fabric. Lighter weight fabrics such as silk (chiffon, organza, crepe-de-chine) will require a smaller sized needle. The lighter the fabric the smaller the needle required. What are sharp needles used for? […]

How often should you add water conditioner to your fish tank? You should do a 25% water change every two to four weeks. There is no reason to remove the fish during the water change. Make sure you stir the gravel or use a gravel cleaner during the water change. When adding water back in […]

Why is fortnite bad? Fortnite is harmful for kids. First of all, it can be addictive. Sure, it doesn’t show blood, but players still kill each other, and that’s too intense for kids. The game is free, but it pushes players to spend money to buy extras, like dance moves for the characters. Is Minecraft […]