Recent content by saln1

I'm guessing the answer will end up being it was always there, or the laws of physics were different at the time of the big bang, but I'd just like some clarification.

Does a hard drive weigh more when data is stored in it?

So when I was told a perfect vacuum is impossible, I was told a lie?

Can someone explain in layman terms the purpose/function of the weak nuclear force?

As the title states, if I go to space and detect several atoms per square meter of space, does this suggest that the space between these atoms is essentially void of all forms of matter? Thus is this a perfect vacuum?

Is the space between the electron shell and nucleus a perfect vacuum?

2 random thoughts that struck me: Q1. If an object is moving downwards towards a large mass at just under the speed of light, will the effects of gravity effectively "stop working" in order to keep the velocity below c? Q2. If a bullet is fired vertically upwards on the surface of the...

Can you explain physically why this is? Isn't the shell just composed of electrons orbiting the nucleus, rather than being an impenetrable solid? As above

If over 99.9% of an atom's mass is concentrated in the nucleus, the rest being "empty", why is matter (simply composed of atoms) clearly visible, rather than being largely invisible? Also, why can't I move my hand through a solid table? Where is this empty space constituting the majority of...

This is my first post, so sorry if this is in the wrong section. I just came across an article which stated "At any time, it is estimated that there are some 10 quintillion (10,000,000,000,000,000,000) individual insects alive." Now, this got me thinking about the number of humans on...