A toy dart gun generates a dart with a momentum of 140 kg*m/s and a velocity of 4 m/s. What is the mass of the dart?*

Which statement best describes who the period and frequency of electromagnetic was change between gamma rays and microwaves? a) the period and frequency stay the same. b) the period increases and the frequency decreases. c) the period decreases and the frequency increases. d) the period increases and the frequency increases.

Which is the best predictor of the radioactive nature of an isotope? o the proton-to-electron ratio the neutron-to-proton ratio o the neutron-to-electron ratio the electron-to-proton ratio

The mini-refrigerator fire was most likely caused by what type of wiring?