An object weighing 89.7g is placed in graduated cylinder displacing the volume from 50.0ml to 60.5 ml

Which type of substance ionizes partially and gives off hydrogen ions when dissolved in water? a. strong acid b. strong base c. weak acid d. weak base

Frictional forces acting on an object are often converted into energy, which causes the temperature of the object to rise slightly.

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.