5. Total internal reflection occurs when the angle of incidence in a denser medium is greater than the critical angle (0; > 0c), then the angle of refraction is greater than 90°, (so the ray comes
back to the medium itself).
(i) Sketch this concept as described (4marks)

Note: the following questions are unrelated to the balmer series or the martian. refer to your course notes. a sun-sized star will spend most of its lifetime as a: white dwarf b. red giant c. protostar d. main-sequence star

Ihave a density of 1.61g/cm^3 and a mass of 28g. find the missing value

It's a snowy day and you're pulling a friend along a level road on a sled. you've both been taking physics, so she asks what you think the coefficient of friction between the sled and the snow is. you've been walking at a steady 1.5m/s, and the rope pulls up on the sled at a 32 ∘ angle. you estimate that the mass of the sled, with your friend on it, is 65 kg and that you're pulling with a force of 80 n .