Physics crossword

3. The smallest unit of measurement in which space and time do not fall apart
5. The unit for measuring pressure
6. Space in which there is no matter
8. An elementary subatomic particle with no electric charge, very little mass, and 1/2 unit of spin
11. A unit of frequency
12. A certain amount of force you apply for a certain amount of time to cause a change in momentum
14. A hypothetical particle that always travels faster than light
15. A hypothetical structure connecting disparate points in spacetime
16. Sounds below a frequency of 20 Hz
17. A mathematical model that combines the three dimensions of space and one dimension of time into a single four-dimensional manifold
19. The antimatter counterpart of the electron
21. A powerful and luminous explosion of a star
23. A sound that is repeated because the sound waves are reflected back
24. The temporary random change in the amount of energy in a point in space

1. A place that is infinitely dense and with 0 volume
2. The unit of the magnifying power of a lens
4. The ability of a quantum system to be in multiple states at the same time until it is measured
5. The fundamental particle of light
7. A force on a surface which is in the opposite direction to its motion
9. The smallest building block of the universe
10. The study of the motion of air when it is affected by solid objects
13. A measure of disorder and affects all aspects of our daily lives
18. A particle thought to be the carrier of the gravitational field
20. The distance between the resting position and the maximum displacement of the wave
22. Unit for measuring the relative loudness of sounds