Answers to Physics Questions

Physics, cosmology, astrophysics, electricity, energy, forces, gravity, light and maths...

04 April 2017

If fragments of Mars have landed on Earth, could the reverse be true?

04 April 2017

If we had a telescope powerful enough to see all the way back to the Big Bang, what direction should we point it?

14 March 2017

When should you replace your bulbs: as they break or as soon as possible?

07 March 2017

What's the minimum number of photons our eye can detect?

07 March 2017

At what altitude above the Earth is zero gravity experienced?

07 March 2017

What will the Event Horizon Telescope see?

07 March 2017

If I jumped just before the elevator hit the ground would it mitigate the effects on my body?

07 March 2017

What's so special about the size of the Earth that makes life more likely?

21 February 2017

Would a mirror lightyears away in space show us our planet's ancient history?

07 February 2017

How do we get back to earth from the moon?

07 February 2017

What's the difference between a US and a UK billion?

07 February 2017

Why don't lightning strikes on the ocean kill marine life?

07 February 2017

Seeing as Earth is just right for life, does that make hunting for ET futile?

07 February 2017

If pi just keeps going, how do we keep finding more numbers?

07 February 2017

Can we make gravity by spinning a spaceship?

06 February 2017

Is a spacewalk really a big deal?

06 February 2017

If you started counting when you were born, what number would reach before you died?

31 January 2017

Why don't compasses point to East or West?

17 January 2017

What would have happened if Neil Armstrong had taken one giant leak for mankind?

10 January 2017

...and where does the sky end?

10 January 2017

Normally, when stuff collides, things fly apart from each other. So how did planets form in the first place?

10 January 2017

If sheets rubbing together can cause static, could this start a fire?

10 January 2017

Seats are weighty, but would it make much of a saving?

10 January 2017

Theoretically, there many be many universes but why do we think this?