The discovery of cosmic microwave background radiation and primordial helium gas was scientific evidence supporting the
big bang theory
nebular theory
steady state theory
oscillating universe theory

Ascientific blank must be testable and capable of being proven false?

Can you match these to the correct definition

Two kilograms of air within a piston–cylinder assembly executes a carnot power cycle with maximum and minimum temperatures of 800 k and 300 k, respectively. the heat transfer to the air during the isothermal expansion is 60 kj. at the end of the isothermal expansion the volume is 0.4 m3. assume the ideal gas model for the air. determine the thermal efficiency, the volume at the beginning of the isothermal expansion, in m3, and the work during the adiabatic expansion, in kj.