Category: Physics

What are the three main states of matter? They are very compressible (particles are widely spaced). There are three states of matter: solid; liquid and gas. Can be compressed into smaller spaces? Because there is space between the particles, they can be squashed into a smaller volume when the gas is compressed….particles are fixed to […]

What are the most common two letter words? The most common two-letter words are of, to, in, it, is, be, as, at, so, we, he, by, or, on, do, if, me, my, up, an, go, no, us, am. The most common three-letter words are the and and. Which vowel is used least? Z What are […]

How do you write a DNA sequence from mRNA? DNA utilizes four bases, adenine (A), guanine (G), cytosine (C), and thymine (T), in its code. RNA also uses four bases. However, instead of using ‘T’ as DNA does, it uses uracil (U). Therefore, if your DNA sequence is 3′ T C G T T C […]

Is every 13th wave bigger? It is not true that every 13th wave is larger than the others, as claimed in the film. In fact, there exists no pattern in wave sizes. In the original Kon-Tiki documentary, it was shown that the crew simply waited for a wave big enough to carry them over the […]

Are temperature and moles directly proportional? At constant temperature and pressure the volume of a gas is directly proportional to the number of moles of gas. At constant temperature and volume the pressure of a gas is directly proportional to the number of moles of gas. What happens to pressure when volume and temperature decrease? […]

How energy is transformed in our body? All of the body processes, like digestion, pumping blood, breathing, are powered by cells converting the stored chemical energy into work and heat, in a process called respiration. Inside the muscle cells of the human (or any animal), the chemical energy is transformed (changed) into mechanical work and […]

Is CRT TV bad for eyes? There are two things about CRTs that can potentially damage eyesight. #1 is staring at the same close-range object for hours at a time, causing eyestrain. The muscles that focus the lens are forced to hold one position for a long time, and that can hurt them after too […]

What 4 things are needed for photosynthesis? For photosynthesis to take place, plants need to take in carbon dioxide (from the air), water (from the ground) and light (usually from the sun). What are the three end products of photosynthesis? Glucose and oxygen are the final products of photosynthesis. We all know that photosynthesis is […]

Why are heat islands dangerous? Heat islands contribute to higher daytime temperatures, reduced nighttime cooling, and higher air-pollution levels. These, in turn, contribute to heat-related deaths and heat-related illnesses such as general discomfort, respiratory difficulties, heat cramps, heat exhaustion, and non-fatal heat stroke. What causes a heat island? How Do Heat Islands Form? Tall buildings […]

Can we determine the distance a gun was fired from by the wound? The size and density of the pattern of residues on the object can vary with distance, allowing a firearm examiner to determine the proximity of the shooter to the target when the gun was fired. Examiners test fire the shotgun at different […]