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A 0.400 kg piece of metal at 373 K is dropped into a 0.100 kg aluminum cup containing 0.500 kg of water at 288 K. The final temperature of the system is 313 K. What is the specific heat of the metal, assuming no heat is exchanged with the surroundings? The specific heat of aluminum is A) 1.93 times 10^3 J/(kg K) B) 2.27 times 10^3 J/(kg K) C) 4.28 times 110^3 J/(kg K) D) 3.30 times 10^3 J/(kg K) E) 3.80 times 10^3 J/(kg K) The first satellite that was launched into orbit around Earth was sputnik I on 4 October 1957. It had an average radius of 697 10^6 m from center of the earth. Assuming a circular orbit, what is the orbital the speed of the satellite? The mass of Earth is 5.97 times 10^24 kg and G=667 times 10^-11 N m^2/kg A) 6.23 times 10^3 m/s B) 797 times 10^3 m/s C) 1.10 times 10^3 m/s D) 7.56 times 10^3 m/s E) 1.34 times 10^4 m/s

Answer 1

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