Scientists conduct experiments to collect evidence. which of the following is the best definition of the word experiment as used by scientists?

Nuclear fusion is the source of energy for stars. besides hydrogen, which other element is most likely also common in stars?

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?

How many moles of bromine are needed to produce 3.23 moles of potassium bromide