Why do iron filings catch fire? 1 Answer. Iron has a strong molecular force of attraction. Hence when heated it doesn’t reach its ignition temperature and doesn’t burn. But iron fillings when sprinkled in flames attain the ignition temperature ( as iron filings are comparatively smaller particles) and gain a larger surface area for the […]
What were some of the earliest forms of life?
What were some of the earliest forms of life? The earliest life forms we know of were microscopic organisms (microbes) that left signals of their presence in rocks about 3.7 billion years old. The signals consisted of a type of carbon molecule that is produced by living things. What factors are the most critical in […]
Does a night light use a lot of electricity?
Does a night light use a lot of electricity? Night lights come in a variety of types including incandescent, neon, electroluminescent and LED (light-emitting diode). This is how much electricity the night light will use when it is on. Typical incandescent or neon night lights use about 1.5 to 7.5 watts of energy. Can LED […]
What is modulation in simple words?
What is modulation in simple words? Modulation is the process of converting data into radio waves by adding information to an electronic or optical carrier signal. A carrier signal is one with a steady waveform — constant height, or amplitude, and frequency. What are the different types of modulation techniques? Modulation techniques are roughly divided […]
Which filament is used in electrical bulb?
How is hyperopia corrected?
How is hyperopia corrected? Hyperopia can easily be corrected by wearing glasses with converging lenses or contact lenses. Even if the degree of hyperopia is small, correction is still advisable to prevent secondary problems such as headaches or eye irritation. Can hyperopia be cured? Long sight can be corrected by glasses or contact lenses, or […]
What is the role of oxygen and carbon dioxide on our planet?
What is the role of oxygen and carbon dioxide on our planet? Carbon dioxide is an important greenhouse gas that helps to trap heat in our atmosphere. Without it, our planet would be inhospitably cold. Respiration, the process by which organisms liberate energy from food, emits carbon dioxide. When you exhale, it is carbon dioxide […]
Which of the following is an balanced equation?
Which of the following is an balanced equation? Balanced chemical equation is given as following: C2H5OH(ℓ)+3O2(g)⟶2CO2(g)+3H2O(ℓ) What type of reaction is Fe cl2? FeCl 2 is a reducing agent, FeCl 2 is an oxidizing agent. This is a precipitation reaction: Fe is the formed precipitate. This is a gas evolution reaction, Cl 2 is the […]
What is the net force on the apple when you release it to fall in the absence of air resistance?
Why do so many people struggle with physics?
Why do so many people struggle with physics? Why do so many students struggle with physics? Physics is often contrary to common sense and everyday experience. Consequently people learn and know a lot of stuff that is just wrong. They can be reluctant to let go of these wrong ideas. What jobs pay 250k a […]