A lemon has a ph of 2. Would it have a higher or lower concentration of hydrogen ions than a banana with ph of 4.8? Explain

Aradio signal from a gps satellite take only about 0.067 seconds to reach a gps reciever. if the speed of light is about 300,000km/s, then approximately how far away is the reciever from from the satellite?

Define dew point. i am writing this part to be able to ask the question

What happens to isotopes that are unstable?