Category: Physics

Can I buy a meteorite? Stone meteorites are sold as complete stones, as slices and end cuts, and also as broken fragments. Sometimes the buyer may have a choice about the type of specimen for the particular meteorite they will purchase. What is an example of a meteorite? Achondrites include meteorites from asteroids, Mars and […]

What happens to centripetal acceleration when radius is doubled? Correct answer: Where is the centripetal acceleration on an object, is the velocity of an object, and is the radius in which the object moves in a circle. The velocity has an quadratic relationship with centripetal acceleration, so when the velocity is doubled, the centripetal acceleration […]

What is the most beautiful star? Betelgeuse Star What color is the coldest? Blue What color is a dying star? As a star like the Sun ages, it exhausts the hydrogen that fuels its nuclear fusion, and increases in size to become a red giant. Then it ejects its outer layers into space, producing a […]

What happens if the central nervous system is damaged? You may experience the sudden onset of one or more symptoms, such as: Numbness, tingling, weakness, or inability to move a part or all of one side of the body (paralysis). Dimness, blurring, double vision, or loss of vision in one or both eyes. Loss of […]

What qualifications do you need to be a roller coaster engineer? Structural engineering and mechanical engineering are the two types of degree that are most closely involved with building rollercoasters. To do a degree like that, you’d need good science GCSEs (or equivalents) and to have studied maths and physics at A Level (or equivalent). […]

Why does change in pressure not affect equilibrium constant? Equilibrium constants aren’t changed if you change the pressure of the system. That means that if you increase the pressure, the position of equilibrium will move in such a way as to decrease the pressure again – if that is possible. It can do this by […]

Does burning fossil fuels decrease oxygen levels? Oxygen levels are decreasing globally due to fossil-fuel burning. This corresponds to losing 19 O2 molecules out of every 1 million O2 molecules in the atmosphere each year. Is oxygen in the atmosphere declining? Oxygen makes up one-fifth of the air we breathe, but it’s the most vital […]

How harmful is the radiation from the sun? Excessive exposure to the sun is known to be associated with increased risks of various skin cancers, cataracts and other eye diseases, as well as accelerated skin ageing. It may also adversely affect people’s ability to resist infectious diseases, and compromise the effectiveness of vaccination programmes. Does […]

Is walking 5 kms a day enough? Frequency, duration, and tempo (pace, speed): It is best to walk every day because daily walking allows the good effects to accumulate. The pace most often recommended is a brisk pace which translates to about 90-110 steps per minute or 4-5 km/hour. Can we walk 10 km a […]

Is it safe to mix acids and bases? Acids and bases can both be extremely dangerous. Remember that acids and bases can both be corrosive and/or irritating to human skin, so make sure not to make skin contact. Wear safety goggles at all times when dealing with acids and bases, and your teacher may even […]