A net force of 0.8 N is acting on a toy train. The toy train is accelerating at a rate of 0.4 m/s2. What is the mass of the train?

Calculate the mass of an object that has a momentum of 100kg x m/sec and velocity of 4 m/sec

Which statement correctly describes a step-up transformer? a. it increases the amount of electric energy available. b. it increases the voltage of an electric current. c. it changes direct current into alternating current. d. it has more loops of wire in its primary coil.

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