Archaeologists use a mass spectrometer to seperate the nitrogen isotopes 14N and 15N. The +1 ions of 15N enter the spectrometer with a speed of 8.5 km/s, and they travel in a circular arc of radius 25.0 cm. The magnetic field in the spectrometer has strength 5.29*10^-3 T. What is the mass of a 15N atom? Let the charge on a proton q=1.6*10^-19 C.
2.49*10^-26 kg
4.01*10^-25 kg
3.40*10^-22 kg
2.49*10^-23 kg

Which type of bond is found between the atoms of a molecule? a. metallic b. delocalized electron c. covalent d. ionic

There are two-speed cameras, one in an are where the speed limit is 30 km/h and another where the speed limit is 50 km/h. in which will there be a smaller time interval between the photographs? explain your answer.

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