Unfortunately, I am not a particle physicist, so I hope that I will not be fundamentally wrong in the fact that my answer is: we do not know. More precisely, we do not know and will not know. In our world (in terms of size) we are able to accurately measure, take pictures, and weigh anything. And as our technologies keep improving, we’re able to measure more and more accurately ...

Personally, I wouldn’t be afraid that someone could die of a banana overdose. Although the “banana equivalent” is given as an auxiliary unit describing radiation, I do not think that its value reflects the real effect of the banana on the increase in radiation in our body ...

You correctly describe that the tide is caused by the gravitational force of the Moon. The magnitude of the gravitational force depends, among other things, on the distances of the bodies. Therefore, gravity acts the most on the water on the near side of the Earth, and therefore, there is high tide ...

The effect of atmospheric pressure on the boiling temperature can be imagined as water molecules trying to get out of the liquid. The higher the air pressure, the more air molecules are above the water surface and the more difficult it is for the water molecules to penetrate the air. So if the pressure is zero, water molecules could easily penetrate to the environment ...

Purely theoretically, I can’t see a problem with that. The colour of a star depends on its composition and temperature. The sun is yellow precisely because it consists mainly of hydrogen and also partly of helium and its surface temperature is about 6,000 °C. If we had hydrogen in a glass tube and heated it to the same temperature, it would glow yellow ...

The very definition of absolute zero says that 0 K (i.e. −273.15 °C) cannot be achieved. It is one example of the limitations that nature gives us. Why this is so (that is, why nature limits us in this way) is more of a philosophical question but it can be shown in several cases that reaching absolute zero would be at least strange ...

The microwave oven is an example of an invention that was created not on the basis of a theoretical design, but happened by chance. While working on military radar components, Percy Spencer discovered that a chocolate bar in his pocket had melted. He researched further and the result was a microwave. Warm bodies differ from cold ones in that the molecules move faster in them ...

The first possibility is that the thing (the Sun, a bulb, fire) emits light. In this case, the colour of light is determined by the material of the body and its temperature (so the Sun is yellow just because it consists of hydrogen and has a temperature of about 6,000 °C). Iron is orange during the casting just because it has a certain temperature and because it consists of iron ...

I will try to explain the question with an analogy of the postal services. We use electricity to fulfil its work and the post office to send packages. In the case of the electricity, charged particles (especially electrons, but also ions) do the work. At the post office, the postman does the work (in the case of Amazon, a drone is planned) ...

It could be expected that outside of sci-fi movies, we will not know how a human would end up if they were exposed to the current of really accelerated particles in the accelerator, but in the 1970s, something similar happened in Russia. Anatoly Bgorsky inserted his head into a proton accelerator because of a failure in the security device and beams of accelerated protons flew through his head ...

Light colour is made by its frequency and as you write correctly, light is a type of electromagnetic wave and is specific “only” by that it is about the frequencies we see. The frequency of the electromagnetic waves can be arbitrary and so our perception is limited to a narrow part of the spectrum (in frequencies 10¹⁴ Hz) ...

A convex mirror is used in a car’s rearview mirror — this is the reason it always creates a reduced and inverted image. But the image that is created is reversed. If you want to shake your right hand with your image in the mirror, you will see for yourself. From our point of view, the hand is on the right, but in reality one would shake your hand from the left ...

I hope that no one will have to experience this situation because it will not be possible to jump in a falling elevator — I will explain the situation where we do not take into account the air resistance. If an elevator falls, the elevator will move with the acceleration of gravity g (we won’t count air resistance) ...

It is true that the plane takes off due to the geometry of the wings. The upper part is more bulging than the lower part and therefore the air flows at a higher speed around the upper part of the wing than the lower part. And it follows from Bernoulli’s equation that the higher the velocity of the fluid, the lower the pressure at a given location ...

Yes, that’s right. A pressure wave is typically created by an explosion (it doesn’t matter what the source is) compressing the surrounding air. Because air is a flexible environment, this compression will spread further. You can try something similar yourself — just push water in a pool (or in a bath or pond) with your palm ...