What is the work a weightlifter is accomplished if he was holding a 150 kg weight up for 5 minutes?

What is the fate of the electrons that interact with a specimen in an electron microscope?

Which is the correct symbol for an isotope of iodine with 53 protons and 78 neutrons?

Although longitudinal waves can travel through all media types what is the disadvantage of this type of wave transmission? a) he efficiency of he wave transmission is greatly diminished as the media becomes less dense b) the oscillation of one set of particles has a huge impact on neighboring particles c) particles become too close together as they bump into each other making it more likely to hit other particles down the line