An 80-g aluminum calorimeter contains 380 g of water at an equilibrium temperature of 20°C. A 120-g piece of metal, initially at 352°C, is added to the calorimeter. The final temperature at equilibrium is 32°C
Assume there is no external heat exchange. The specific heats of aluminum and water are 910 J/kg•K and 4190 J/kg•K, respectively. The specific heat of the metal is closest to A) 520 J/kg ? K.
B) 480 J/kg ? K.
C) 390 J/kg ? K.
D) 350 J/kg ? K.
E) 560 J/kg ? K.
A
You might also like to view...
The number of cycles of a periodic process that occur per unit time is called
a. amplitude. b. frequency. c. period. d. wavelength. e. speed.
A string that is 0.15 m long and fixed at both ends is vibrating in its n = 5 harmonic. The sound from this string excites a pipe that is long and open at both ends into its second overtone resonance
What is the distance between a node and an adjacent antinode, in the string? The speed of sound in air is 345 m/s. A) 7.5 mm B) 23 mm C) 150 mm D) 30 mm E) 15 mm
A train traveling at 50. km/h approaches another train moving toward the first at 90. km/h. If they are 35. km apart (on a straight track) how long does it take before they meet?
A) 15. min B) 55. min C) 30. min D) 45. min E) 25. min
Consider the following reaction. ?+ + n ? ?– + p This reaction is impossible because it violates which conservation law?
a. baryon number b. lepton number c. strangeness d. charge e. two of the above