30.0 QUESTIONS:
(i) State two sources of error in this experiment.
(ii) State two precautions you took to ensure good results.
18
Moment and Archimedes principle

Write a question about how changing temperature affects the gas inside the sports ball

Light traveling in water, nwater = 1.33, strikes a plastic block at an angle of incidence of 51.4°; part of the beam is reflected and part is refracted. if the index of refraction of the plastic is 2.0, what is the angle made by the reflected and refracted beams?

What’s #16 asking me and how do i solve it?