Which of the following will dissolve at the fastest rate?

15g of sugar cubes in 120 g of water at 60 degrees C

15g of sugar cubes in 120 g of water at 20 degrees C

15g of granulated (crushed) sugar in 120 g of water at 50 degrees C

15 g of granulated (crushed) sugar in 120 g of water at 20 degrees C

Substance x has a fixed volume, and the attraction between its particles is strong .substance y had widely spread out particles and can be compressed what can most likely be concluded about these substances

This drawing shows a human body system. what is the primary function of this body system?

Which theory was contradicted by experiments with the photoelectric effect? light spreads out after it passes through a small opening. as soon as light strikes metal, electrons will be ejected. visible light, regardless of color, will cause the ejection of electrons when striking metal. the kinetic energy of ejected electrons depends on the frequency of light that strikes the metal.