Category: Physics

What is potential difference and current? **Current vs potential difference: **The current is a flow of charge. Current is measured through a component. Potential difference is the energy used between two points in a circuit, therefore it is measured between two points either side of a component. How do you calculate current and potential difference? […]

What constellation is the sun in on March 21? “Why is the vernal equinox called the “First Point of Aries” when the Sun is actually in Pisces on this date?” The Sun used to be “in” the constellation Aries on the first day of spring, otherwise known as the vernal equinox. Has NASA changed the […]

Are Nescafe jars airtight? Established Member. It’s perfectly OK. Dry goods will – if sealed as your jar of instant bilgewater was – keep for ever. Ignore use by dates, they are mostly a con to make you throw stuff away and buy more. What is the best airtight container? The Rubbermaid Brilliance Pantry Food […]

Are old Brownie cameras worth anything? Brownie cameras take different film sizes, and some are still usable today. Early models can be very valuable if they are in good condition. Can you still get film for a Brownie camera? In 1995, the 620 film that the Hawkeye and other Kodak Brownie cameras were designed to […]

What is power of accommodation How ciliary muscles help in accommodation? The ability of eye lens to adjust its focal length to form a sharp image of the object at varying distances on the retina, is called its power of accommodation. Help by the ciliary muscles in accommodation: When we are looking at nearby object, […]

Does HCN have a dipole moment? (d) HCN is a linear molecule; it does have a permanent dipole moment; it does contain N, however the nitrogen is not directly bonded to a hydrogen. Therefore dispersion forces and dipole-dipole forces act between pairs of HCN molecules. Is HCN a strong acid? Strong acids are 100% ionized […]

What is meant by order of magnitude? Orders of magnitude are used to make approximate comparisons. If numbers differ by one order of magnitude, x is about ten times different in quantity than y. If values differ by two orders of magnitude, they differ by a factor of about 100. How many seconds are present […]

How do you neutralize acid mine drainage? The most prevalent method for treating AMD contamination is the addition of alkaline reagents such as lime, limestone, sodium carbonate or sodium hydroxide. This treatment aims at neutralizing acidic water and the precipitation of heavy metals. How do you fix acid mine drainage? Some common methods include: Reclamation […]

What is the most important contribution in biology today? Some of the most important discoveries, which have occurred in the past 50 years, are bacterial insulin synthesis, gene therapy, stem cell technology, somatic cell nuclear transfer, transgenic organisms and organ transplant technology. Who is the greatest biologist in history? Top ten biological discoveries Charles Darwin […]

What are the short term effects of exercise on the circulatory system? Short term effects of exercise on the body systems Short term effects of exercise Cardiovascular system Increase in stroke volume (SV); increase in heart rate (HR); increase in cardiac output (Q); increase in blood pressure (BP) Respiratory system Increase in breathing rate; increase […]