What is the mass of an object moving at a speed of 9.0 m/s with a kinetic energy of 320 J? Group of answer choices

71 kg

0.51 kg

2.0 kg

4.0 kg

7.9 kg

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 first law of thermodynamics states that heat added to a system is neither created nor destroyed but is as it changes into other forms of energy.

Compare the patterns of the two waves shown in the image. which statement is true about these waves?