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An aluminum bar of mass 2.00kg at 300 C is thrown into a lake. The temperature of the water in the lake is 15.0 C; the specific heat capacity of aluminum is 900J/kg K. Since the aluminum bar is not an isolated system, the second law of thermodynamics cannot be applied to the bar alone. Rather, it should be applied to the bar in combination with its surroundings (the lake). Assume that the entropy change of the bar is -73.5J/K , what is the change in total entropy Delta S total?
The total electric field consists of the vector sum of two parts. One part has a magnitude of E1 = 1300 N/C, Find the magnitude and direction of the total field
A stone is dropped into a river from a bridge 43.90 m above the water. Another stone is thrown vertically down 1.00 after the first is dropped. The stones strike the water at the same time.
Five identical particles of mass m = 0.30 kg are mounted at equal intervals on a thin rod of length scripted l = 1.13 m, find the angular momentum of the system
While a roofer is working on a roof that slants at 44.0 above the horizontal, he accidentally nudges his 93.0 toolbox, causing it to start sliding downward, starting from rest.
Two stationary positive point charges, charge 1 of magnitude 3.45 nC and charge 2 of magnitude 1.50 nC, are separated by a distance of 52 cm. An electron is released from rest at the point midway between the two charges, and it moves along the lin..
A proton accelerates from rest in a uniform electric field of 652 N/C. At some later time, its speed is 1.26 106 m/s. How far has it moved in that interval
Two point charges 2.0cm apart have an electric potential energy -400?J . The total charge is 25nC, What is the lesser and larger charge
A runner is practicing on a circular track that is 535 m in circumference. From the point farthest to the east on the track, he starts off running due south and follows the track as it curves around toward the west.
A loudspeaker at the origin emits a 140Hz tone on a day when the speed of sound is 340 m/s. What is the distance between these two points
Two capacitors are connected in series. Let 3.40mF be the capacitance of first capacitor, Calculate the potential difference across each capacitor
King Arthur's knights fire cannon from the top of the castle wall. The cannonball is fired at a speed of 60 m/s and an angle of 33. A cannonball that was accidentally dropped from the top of the castle wall hit the moat below in 1.80s.
The resistance of a conductor is 19.2 ohms at 1.50 degress C and 25.0 ohms 91.0 degress C. What is the temperature coefficient of the resistance
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