Category: Physics

What is the biggest challenge facing farmers over the next decade? The following five challenges to the future of agriculture and food security exist on almost every continent in one form or another: constraints on resources from fossil fuel to water to phosphorus; land management problems resulting from tillage to monoculture to improper grazing practices; […]

Why does metal heat up fast? Why do metals conduct heat so well? The electrons in metal are delocalised electrons and are free moving electrons so when they gain energy (heat) they vibrate more quickly and can move around, this means that they can pass on the energy more quickly. Does glass or metal heat […]

Do Town criers get paid? These days, town criers are typically paid by appearance, although free ‘crys’ for charitable events are very often a large part of their duties. Are town criers paid? Bellmen would be paid for each proclamation they made: in the 18th century the rate was between 2d and 4d per cry. […]

What is the relationship between frequency and wavelength in sound waves? Frequency and wavelength are inversely proportional to each other. The wave with the greatest frequency has the shortest wavelength. Twice the frequency means one-half the wavelength. For this reason, the wavelength ratio is the inverse of the frequency ratio. What is the formula to […]

How strong of a telescope do I need to see Saturn? The rings of Saturn should be visible in even the smallest telescope at 25x [magnified by 25 times]. A good 3-inch scope at 50x [magnified by 50 times] can show them as a separate structure detached on all sides from the ball of the […]

Does the gas mixture do work or is work done on it? 1 Expert Answer As the gas heats up, its pressure should rise, which in turn displaces the piston in the outward direction. This is positive work, i.e. work being done by the system. Since the piston moves out, the gas mixture does work […]

What will happen if an ammeter is connected in parallel? A voltmeter is used to measure potential difference across two points in an electrical circuit. When ammeter is connected in parallel to the circuit, net resistance of the circuit decreases. Hence more current is drawn from the battery, which damages the ammeter. Why does Ammeter […]

What are some examples of liquidity? Ranking of Market Liquidity (Example) Cash. Foreign Currency (FX. The USD is the most widely traded currency in the world, and is involved in over 81% of all forex trading. Guaranteed Investment Certificates (GICs) Government Bonds. Corporate Bonds. Stocks. Commodities (physical) Real Estate. Is there any liquid that doesn’t […]

Is H2 more stable than H2O? By sharing even with another atom of the same element, the molecule is more stable than a single atom of that element. The O atom of H2O forms the hydrogen bond with the H atom of the halogenoalkane. Why are molecules more stable than separated atoms? A molecule as […]

What is producer gas formula? Producer gas is a mixture of (1) CO + H2 (2) H2 + CH4 (3) CO + N2 + H2 (4) CO + H2O. Unlike natural gas, producer gas is fuel gas that is made from material such as coal. A combustible mixture of nitrogen, carbon monoxide, and hydrogen gives […]