Apencil flashlight submerged in water sends a light beam toward the surface at an angle of incidence of 30^\circ30 ∘ . what is the angle of refraction in air?

When an object falls through the air and encounters air resistance its overall speed will be than if it had not encountered air resistance? (one word answer)

Achemistry student weighs out 0.306 g of citric acid (h3c6h5o7), a triprotic acid, into a 250 ml volumetric flask and dilutes to the mark with distilled water. he plans to titrate the acid with 0.1000 m naoh solution. calculate the volume of naoh solution the student will need to add to reach the final equivalence point. be sure your answer has the correct number of significant digits.

How could a student test the effect of removing heat from a gas that is stored in a sealed container? what must occur in order for matter to change states?