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470 cm3 of water at 82°C is mixed with 95 cm3 of water at 8°C. Calculate the final equilibrium temperature, assuming no heat is lost to outside the water. Imagine now that one tried to repeat the same measurement, but between the time that the 470 cm3 of water was measured at 82°C and the time it was mixed with the 95 cm3 of water at 8°C, the warmer water had lost 2820 cal to the environment. Calculate the final equilibrium temperature assumning no heat loss after mixing occurs.
Compute the heat absorbed by the gas and work done by the gas during expansion.
A flight attendant pulls her 65N flight bag a distance of 388m along a level airport floor at a constant velocity. The force she exerts is 38 N at an angle of 51° above horizontal.
Illustrate what is the intensity of the beam transmitted through the three sheets when 1 = 19.0°, 2 = 51.0° and 3 = 100.0° ?
A steel wire of mass 0.400kg and length 0.640m supports a 102 kg block. The wire is struck exactly at its midpoint causing a small displacement. How long does it take the peak of this displacement to reach the top of the wire.
What is the potential difference in volts between the plates.
A 140 kg piano is being lifted at a steady speed from ground level straight up to an apartment 16.0 m above the ground. The crane that is doing the lifting produces a steady power of 400W. Explain how much time does it take to lift the piano?
A 0.75 kg ball attached to the end of a horizontal cord, is rotated in a circle of radius 1.9 m on a frictionless horizontal surface, What is the max speed the ball can have
Two long straight parallel wires are 12cm apart. Determine the force on wire A due to wire B, and the force on wire B due to wire A.
A "Carnot" refrigerator (reverse of a Carnot engine) absorbs heat from the freezer compartment at a temperature of -17°C, How much work must be done by the refrigerator to change 0.20 kg of water at 24°C into ice at -17°C
The power required by an ice maker is 225 W and is the rate at which it does work. determine the maximum amount of ice the unit can produce in one day
A spherical balloon has a radius of 8.45 m and is filled with helium. How large a cargo can it lift, assuming that the skin and structure of balloon have a mass of 1300 kg? Overlook the bouyant force on the cargo volume itself.
A "105-watt" lightbulb uses an average power of 105 W when connected to an rms voltage of 120 V. What is the resistance of the lightbulb
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