Category: Physics

What does it mean when the two runners graphs cross? What does it mean when the two runners’ graphs cross? When the two runners graphs cross this means that in the graph above that runner 2 was behind but caught up and ran past runner 1 beating him to the finish line (40 meters). How […]

How can we prevent radiation from gadgets? 10 ways to avoid radiation from your gadgets Never carry cellphones on your body. Cellphone manuals say it should be kept at least an inch from your body. Keep your distance when you talk. Toggle data on and off. Calls are out, messaging is in. Cut the cordless. […]

What is the Joule equal to? One joule equals the work done (or energy expended) by a force of one newton (N) acting over a distance of one meter (m). One newton equals a force that produces an acceleration of one meter per second (s) per second on a one kilogram (kg) mass. Therefore, one […]

What is the formula of path difference? The general formula for destructive interference due to a path difference is given by δ = (m + 1/2) λ / n where n is the index of refraction of the medium in which the wave is traveling, λ is the wavelength, δ is the path difference and […]

What is the density of oxygen in kg m3? 1141 kg/m3 What is the density of gold in kg m3? 19,300 kg/m3 How heavy is 1m3 gold? One cubic meter of gold weighs roughly 19.3 metric tons, or about 42,549.22 English pounds. Is gold high in density? With a density of 19.32 grams per cubic […]

How do skiers reduce drag? Skiers can reduce drag by performing an effective ‘tuck’. To do a tuck, lower your stance and level your back parallel to the slope. This position means less wind hits your body, and the eggs-with-legs shape lets wind cut around you, reducing drag even further. Why do longer skis go […]

How do you find boiling point with temperature and pressure? If the boiling point values for a specified substance at a specified BP temperature and pressure are given, one can determine the Boiling Point at different vapor pressure values using the Clausis-Clapeyron Equation. The Clausis-Clapeyron Equation is derived from VP2=VP1e−ΔHvRT at two different temperatures. What […]

Can a bulb added in a circuit with twisted wires light up? Answer. Answer: Yes,because it is still a complete circuit. What must be true for a circuit to light a bulb? Based on what you have seen, what must be true for a circuit to light a bulb? There has to be a lightbulb […]

Why do I get anxiety driving on the highway? Freeway phobia is really a manifestation of agoraphobia. Exposure therapy means just what it sounds like it means. With the help of a therapist, you gradually increase your time on the freeway, exposing yourself to your fears until they subside. How common is fear of driving? […]

What is gamma spectroscopy used for? Gamma-ray (γ-ray) spectroscopy is a quick and nondestructive analytical technique that can be used to identify various radioactive isotopes in a sample. In gamma-ray spectroscopy, the energy of incident gamma-rays is measured by a detector. How do we measure gamma rays? Scientists can use gamma rays to determine the […]