8 The forces of volcanic eruptions vary. Some eruptions explode violently,
and others are slow and quiet. Which type of eruption is happening when
Pyroclastic materials are released?
F. a quiet eruption
G. a violent eruption
H. a moderate eruption
I. quiet eruplions alternating with moderate cruptions

Ascientist notices that an oil slick floating on water when viewed from above has many different colors reflecting off the surface, making it look rainbow-like (an effect known as iridescence). she aims a spectrometer at a particular spot and measures the wavelength to be 750 nm (in air). the index of refraction of water is 1.3