A chunk of brass with mass 0.6 kg, with specific heat 380 J/(kgÂ· K), and with...

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Physics

A chunk of brass with mass 0.6 kg, with specific heat 380 J/(kgÂ·K), and with temperature 400 K is placed in 0.6 kg of water, withspecific heat 4186 J/(kgÂ· K), and with temperature 280 K. The waterand the brass are in an insulated container and come to thermalequilibrium. Find the final temperature in kelvins (closestanswer).
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A radioactive sample is measured to be emitting 200 alphaparticles per second. 20 minutes later it is emitting only 126alpha particles per second. The half life of the unstable nucleusthat is emitting these particles is - (in minutes, closestanswer)

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3.8 Ratings (475 Votes)

a mass of brass m1 06 kg Specific heat capacity of brass S1 380 JkgK Initial temperature of brass T1 400 K mass of water m2 06 kg Specific heat capacity of water S2 4186 JkgK Initial temperature See Answer

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