Category: Physics

What happens when a ray of light strikes the surface of separation between the two media at right angle? What happens when a ray of light strikes the surface of separation between the two media at right angle? When light enters the boundary of two surfaces at right it passes normally without deviation. This is […]

What does tightening a string do? Tension refers to how tightly the string is stretched. Tightening the string gives it a higher frequency while loosening it lowers the frequency. When string players tighten or loosen their strings, they are altering the pitches to make them in tune. The density of a string will also affect […]

Is Q A joule or kilojoule? You want your q to be in units of Joules or kJ. If you used the q=mC(delta T) with your given C, your q would be in units of (grams)(kJ). In the problem, you were given the heat capacity, not the specific heat capacity. Therefore, you don’t need mass […]

What is a formula of stress? The stress equation is: σ = F/A. F denotes the force acting on a body and A denotes the area. Units of stress are the same as units of pressure – Pascals (symbol: Pa) or Newtons per squared meter. Positive stress means that the object is in tension – […]

Does masturbation affect immunity? An orgasm may benefit your immune system Though the study was very small, the researchers found that masturbation increased the number of inflammatory mediators called leukocytes (white blood cells) and natural killer cells. Both of these fight infection as a part of the body’s immune response. How can you tell if […]

How do you know if an image is real or virtual? (You will have no trouble remembering this if you think about it in the right way: a real image has to be where the light is, which means in front of a mirror, or behind a lens.) Virtual images are formed by diverging lenses […]

What would happen to pressure in the tire if some of the air were removed? The pressure inside the tire will keep on decreasing as more air leaks out of the tire because the number of air particles inside the tire decreases resulting in less collisions than before and due to the less frequent collisions […]

What constellations are visible in both hemispheres? Constellations such as Orion may be seen in both hemispheres, depending on your distance from the equator and the time of year. If you can’t see the entire constellation, it’s likely too close to the horizon line and are too far north or south for complete viewing. Are […]

What are three non-sampling errors? Non-sampling errors include non-response errors, coverage errors, interview errors, and processing errors. A coverage error would occur, for example, if a person were counted twice in a survey, or their answers were duplicated on the survey. What are examples of non-sampling errors? Any error or inaccuracies caused by factors other […]

When galaxies are moving away from us what light color do we see? Visible light is a spectrum of colors, which is clear to anyone who has looked at a rainbow. When an object moves away from us, the light is shifted to the red end of the spectrum, as its wavelengths get longer. If […]