All About Physics?

4. The force of gravity on a body.
5. Power- the rate of doing work;unit of power, one joule per second.
7. Ratio of potential difference across device to current through it.
8. The area of total darkness in the shadow caused by an eclipse.
9. A diagram/bookkeeping device that helps in conceptualizing and calculating interactions between particles in spacetime
10. the distance travelled in a particular direction from a specified origin
12. Force opposing relative motion of two objects are in contact.
13. Antiparticle equivalent of electron.
15. Unit of electrical charge. Charge caused by flow of one ampere for one second.
16. Light that generally comes from the electrons in very hot object.
17. Device that changes force needed to do work.
20. Non-material property capable of causing changes in matter.

1. Atomic nuclei having same number of protons but different numbers of neutrons.
2. One of the scalar versions of velocity and displacement.
3. Device used to measure very small currents.
6. Condition in which net force is equal to zero. Condition in which net torque on object is zero.
11. He developed the general theory of relativity, one of the two pillars of modern physics.
14. Are made up of neutrons and protons, n and p.
18. It is a light and its relatives, from short wave length to long wavelength:
19. Aparticles are just electrons that come from the nucleius when a neutron changes into a proton.