When sodium is excited in a flame, two ultraviolet spectral lines at lambda - 372.1 nm and lambda = 376.4 nm respectively are emitted. which wavelength represented photons?

a) higher energy?

b) longer wavelengths?

c) higher frequences?

Which example would most likely decrease friction? using cleats, rather than gym shoes, on a field using shaving cream, rather than shaving on dry skin using a wide parachute, rather than a narrow parachute, when skydiving using sandpaper, rather

What do astronomers use to calculate the age of the universe? Check all that apply. dark energy the age of rocks on Earth the age of the oldest stars patterns of background radiation how fast distant galaxies are moving away from us

Which analogy best represents a supersaturated solution? an empty elevator that has a maximum load of 20 people a single person in an elevator that has a maximum load of 20 people 20 people in an elevator that has a maximum load of 20 people 25

The various tropisms in plants are caused by localized areas of

Basic molecules contain more ... a hydrogen ions (H+). b water molecules. c hydroxide ions (OH-). d oxygen atoms.

What is molarity of heavy water?

Do all liquids freeze at the same rate

Convert 1.67 x10^24 atoms of carbon to moles of carbon

The knowledge of chemistry not important in one of the following? A, in agriculture B, in Geology C, in medicine D, none

Which is the balanced equation for: Al2O3 + Fe - Fe3O4 + AL