A rigid tank contains 5 kg of an ideal gas at 4 atm and 40°c. Now a valve is opened, and half of mass of the gas is allowed to escape. If the final pressure in the tank is 1. 5 atm, the final temperature in the tank is?.

Kuhl found that babys brains are most open to learning the consonants in their native language at what age? and vowels at what age?

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Two technicians are discussing how to test a car's exhaust by holding a small piece of paper within an inch of the tailpipe mouth. technician a says that if the paper is vibrating due to a "puffing" output from the tailpipe, this signals a smoothly running engine. technician b says that if the paper is being drawn toward the tailpipe, this could indicate burned exhaust valves. who is correct? a. technician b b. both technicians a and b c. technician a d. neither technicians a or b