Category: Physics

What are the disadvantages of bioethanol? What are the disadvantages of bioethanol? Debates surrounding food vs fuel: Some people are concerned that the popularity of biofuel is set to increase food prices across the globe. Efficiency: Biofuel fires tend not to get as hot as their wood-burning alternatives. Cost: Biofuel is often a little more […]

What is the formula for silicon carbide? SiC Is silicon carbide a good insulator? Silicon carbide, in its pure form, behaves as an electrical insulator. Yet, electrical ageing, which is the increase in electrical resistivity, could very well affect silicon carbide’s electrical conductivity properties. Is silicon carbide natural? Silicon carbide (SiC), also known as carborundum […]

Can glass shards kill you? Popular belief for many centuries is that ground-up glass (i.e., glass broken into tiny fragments) can kill if swallowed. In fact, this is a myth, as it is largely ineffective. Why does a glass vessel break when it falls on a hard floor but does not break when it falls […]

Why swimming is easy in sea? Due to high salt in the sea water the density of the sea water is higher as compared to river water. So as the density increases the buoyant force also increases. So the buoyant force is higher in the sea water as compared to river water. So it is […]

Is work done when sitting? Work is done when a force that is applied to an object moves that object. Driving to your job is not work because you just sit, but the energy your car engine uses to move the car does work. You have to exert a force AND move something to qualify […]

What 2 groups are very reactive with water? You get less precipitate as you go down the Group because more of the hydroxide dissolves in the water. The Group 2 metals become more reactive towards water as you go down the Group. There is an additional reason for the lack of reactivity of beryllium compared […]

What are the disadvantages of helicopter? Drawbacks Of Helicopters Generally, helicopters have lower top speeds than airplanes, and are more complex to fly. Helicopters are also more complex mechanically, they need more maintenance which makes them more expensive to operate and maintain than airplanes. Should I fly fixed wing or helicopter? Fixed wing is the […]

Why do carbon atoms have 6 electrons? The electrons like to be in separate shells/orbitals. Once one shell is full, the next electron that is added has to move to the next shell. So… for the element of CARBON, you already know that the atomic number tells you the number of electrons. That means there […]

What triggers ammonium nitrate to explode? Over time, the compound absorbs moisture, which can make the beads stick together into a huge rock, says Sella. When such a large quantity of compacted ammonium nitrate is exposed to intense heat — if, say, an accidental fire breaks out — it can trigger an explosion. Will ammonium […]

Which gas is produced when coal is burnt in air? But when coal burns, its carbon combines with oxygen in the air and forms carbon dioxide. Carbon dioxide (CO2) is a colorless, odorless gas, but in the atmosphere, it is one of several gases that can trap the earth’s heat. What is produced when coal […]