cb8. 13.039Q Air and methane (CH4) combine at the inlet to an internal combustion engine. (Natural gas is largely methane - assume this natural gas consists of only methane.) The mole fraction of the methane in this mixture is 15%. The air-methane mixture enters the engine at 80 kPa and 20 C. The engine is a 4-stroke design and operates at 3000 RPM. The displacement of the engine is 5.0 L. Find the mass flow rate of the mixture as it enters the engine.

Which statement explains which component is likely to be more powerful in explaining a scientific phenomenon? a) component c, because a theory is often passed on possibility and not certainty b) component d, because a hypothesis is often based on possibility not certainty c) component c, because the ability to explain several occurrences in the natural world is a characteristic of a hypothesis d) component d, because the ability to explain several occurrences in the natural world is a characteristic of a theory