Athin beam of laser light of wavelength 514 nm passes through a diffraction grating having 3952 lines/cm. the resulting pattern is viewed on a distant curved screen that can show all bright fringes up to and including ±90.0° from the central spot. if the experiment were performed with all of the apparatus under water (which has an index of refraction of 1.33), what would be the total number of bright spots that would show up on the screen

answer would be letter choice (a),   a ball resting on a shelf. would be another example of potential energy   >   stored energy > not moving.

a ball spinning on a finger   >   kinetic energy > moving energy

a ball rolling on the ground   >   kinetic energy   > moving energy

a   ball flying through the air   > kinetic energy   >   moving energy

hope that                                         : )

c. newton's third law of motion

the order for strong to weak forces such as

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force

the fundamental forces are those forces that act between to objects or element to make interactions. there are four types of fundamental forces such as strong and weak nuclear forces (due to protons and electrons), electromagnetic force (due to the motion of electrons) and gravitational force (due to orbital movement of the planet). if these forces are arranged on the basis of their maximum strength then the order is

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force