Which object has the most thermal energy? A. 2 kg of liquid oxygen at -225°C о O B. 5 kg of oxygen gas at 30°C C. 5 kg of liquid oxygen at -220°C D. 2 kg of oxygen gas at 20°C PREVIOUS

The density of a liquid could be found by using

All the simple machines make work easier to do by changing the or of a force. a. size; type b. work; type c. size; direction d. type; direction

30 points - when can a theory be modified if a new type of technology allows for new observations that raise new questions? a. immediately, while the questions about the theory are being asked b. after new hypotheses related to the theory are tested in experiments c. only after the new observations disprove all parts of the theory d. while scientists begin to think about how the theory could improve