Category: Physics

Who made the HR diagram? Ejnar Hertzsprung What is the biggest difference between a star and a protostar? The fundamental difference between a protostar and a star is that the latter has nuclear fusion as its energy source and the former does not. The birth of stars is a battle between gravity and radiation pressure. […]

What is a step down transformer for voltage? A Step down Transformer is a type of transformer, which converts a high voltage at the primary side to a low voltage at the secondary side. If we speak in terms of the coil windings, the primary winding of a Step down Transformer has more turns than […]

How long does it take for an air embolism to cause symptoms? You may not have these symptoms immediately. They can develop within 10 to 20 minutes or sometimes even longer after surfacing. Do not ignore these symptoms – get medical help immediately. Does an air embolism go away? Small embolisms generally dissipate into the […]

What are advantages of using microwaves? Advantages of Microwaves Supports larger bandwidth and hence more information is transmitted. More antenna gain is possible. Higher data rates are transmitted as the bandwidth is more. Antenna size gets reduced, as the frequencies are higher. Low power consumption as the signals are of higher frequencies. What are the […]

Why does the balloon stick to the wall after it is rubbed on the wool sweater? When you rub a balloon against your clothes and it sticks to the wall, you are adding a surplus of electrons (negative charges) to the surface of the balloon. The wall is now more positively charged than the balloon. […]

What information would you need to know in order to ensure that your coaster would be safe? To ensure the roller coaster is 100% safe you would have to make sure that the acceleration is a a good force so it can be safe and you have to know how to uses the forces correctly […]

What is the wavelength of green light? 550 What color laser is the strongest? green lasers What is the difference between a Class 3 and Class 4 laser? So what’s the difference between class III and class IV lasers? The biggest difference is their maximum power output. The FDA defines a class IIIb laser as […]

Why is hydroxide written as OH? It’s written in “reverse order” because hydroxide is a polyatomic ion that still needs balance to be part of a compound. In most cases, when OH bonds to another ion the oxygen is the one that bonds to the other ion. Because of this it’s is written as OH, […]

What 3 things can be used to measure volume? Chemists use beakers, flasks, burets and pipets to measure the volume of liquids. What are 3 ways to measure the volume of an object? Measure length, width, and height and multiply. 4. How would you calculate the volume of an irregular sized object like a rock? […]

What are some examples of salinity? Primary salinity occurs naturally in soils and waters. Examples of naturally occurring saline areas include salt lakes, salt pans, salt marshes and salt flats. Secondary salinity is salting that results from human activities, usually land development and agriculture. What is the meaning of salinity? Salinity (/səˈlɪnɪti/) is the saltiness […]