A piston containing 0.30 kg of R-134a at 320 kPa and 130°C is cooled at constant volume until the pressure reaches 200 kPa. What is a good approximation for the final temperature? How much total heat was added to the system? g

What produces light and all other electromagnetic waves? a) the photoelectric phenomena b) heated metals c) charged particles d) radioactive samples (pls explain if you can : )

What is the length x of the side of the triangle below? (hint: use the cosine function)

The government has declared that a hurricane is likely to hit the east coast. which government division is part of acf and provides guidance to citizens? a. job opportunities for low-income individuals b. office of human services emergency preparedness and response c. assets for independence d. low-income home energy assistance program