Study the arrow that is circled in the image. What happens at this point?

Warm air is rising.
Cool air is sinking.
There is a difference in air pressure.
Cool air is less dense than warm air.

The photo shows sugar dissolved into a solution with excess sugar at the bottom of the jar this type of solution is classified as a. unsaturated b. compound c. saturated d. plasma

If anyonee has done the momentum lab practical in physics can you give me the answers i am s lostt rnn : (

Ultraviolet radiation is dangerous because it has a high enough energy to damage skin cells. what is the best explanation of the relationship between wavelength and wave energy? a) wave energy is related only to frequency, not wavelength. b) longer wavelengths have lower frequencies but higher energy. c) the shorter the wavelength, the lower the frequency and the higher the energy. d) the shorter the wavelength, the higher the frequency and the higher the energy.