In order to keep an automobile operating, it is necessary to keep adding fuel as it is used up. What kind of system is the car? Explain why this doesn't go against the Law of Conservation of Energy. *

Which material burns faster? metal aluminum

Before it was launched, a helium-filled balloon had a pressure of 201 kpa at a temperature of 27°c. at an altitude of 15,000 m, the pressure had decreased to 2.5 kpa and the temperature had dropped to -14 °c. the volume of the balloon increased to 59.3 m3. what is the original volume of the balloon? 13 m3 0.85 m3 0.077 m3 1.17 m3

What is the most common form of matter in the universe