NEED AWNSER NOW! WILL MARK Which term is defined as the ratio of the speed of light in a vacuum to the speed of light in the material it is passing through? index of reflection

index of refraction

angle of reflection

angle of incidence

Simple machines can a. increase force only b. decrease force only c. increase or decrease force

Why are graphs useful when interpreting data

The freezing and boiling point of a substance changes as the air pressure around it changes. for example, at a lower air pressure (higher altitude) it is easier for water molecules to escape from liquid into the air. in a high altitude city such as denver, colorado compared to a sea-level city such as houston, texas, water