Bart Simpson has chronic low back pain secondary to repeated…

Bart Simpson has chronic low back pain secondary to repeated injury from this job as a factory worker. He benefits from the use of TENS. The TENS setting that Mr. Simpson uses produces a visible contraction. Which theory of pain control is being utilized with Mr. Simpson?

A chemical reaction takes place inside a flask submerged in…

A chemical reaction takes place inside a flask submerged in a water bath. The water bath contains 6.20 kg of water at 24.9°C. During the reaction 51.9kJ of heat flows out of the flask and into the bath. Calculate the new temperature of the water bath in Celsius, do not include the unit only the value. The specific heat capacity of water under these conditions is 4.18·J·g−1K−1. 

A chemist carefully measures the amount of heat needed to ra…

A chemist carefully measures the amount of heat needed to raise the temperature of a [m] kg sample of a pure substance from  −9.4°C to 14.2°C. The experiment shows that 1.2 kJ of heat are needed. What can the chemist report for the specific heat capacity of the substance in J⋅g−1K−1? Your answer should have 2 decimal places.