Which is a correct method used in a scientific experiment involving acid and base solutions? using a ph test strip to measure the oxygen content of a solution adding an indicator to a solution to test its acidity adjusting the recorded ph measurements to prove the hypothesis measuring the ph of a test strip by dipping it into an indicator

Tungsten-filament lightbulb emits light based on the temperature of the filament. which phenomenon does this demonstrate?

8. why do radio telescopes convert radio waves (analog signals) to electrical (digital) signals for analysis? (hint: what did the article say about the advantages of digital signals? )

The speed of sound in ice, water, and steam is shown. what best explains the speed of sound in different states of matter? sound travels fastest in ice because energy is easier to transfer when the molecules are close together. sound travels slowest in steam because the sound has to move around the gas molecules that are far apart. sound travels fastest in ice because the temperature of solids is always greater, so the heat transfers the sound energy. sound travels slowest in steam because the pressure is so great the sound cannot travel though the steam particles.