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A 7.50 g piece of iron at 100 C is dropped into 25.0g of water at 22.0 C. Assuming that the heat is lost by the iron equals the heat gained by the water, determine the final temperature of the iron/water system. Assume a heat capacity of water 4.18 J g-1 K-1 and iron 0.45 J g-1 K-1.
A ferry transports tourists among three islands. It sails from the first island to the second island, 5.41 km away, Calculate the distance between the first and third islands
A box of mass 52.0 kg is connected to a second box with a mass of 58.0 kg. Both are sitting on a horizontal surface, find the magnitude of the tension in the string between the two boxes
Four point charges are at the corners of a square of side a as shown in the figure below. Determine the magnitude and direction of the resultant electric force on q
An object is located in front of a biconcave lens whose focal length is -125 centimeter. Estimate where is the image located? Find what are the characteristics
A point source of light is 82 centimeter below the surface of a body of water. Obtain the diameter of the largest circle at the surface through which light can emerge from the water (nw = 1.33)
A Ferris wheel, rotating initially at an angular speed of 0.50 rad/s, accelerates over a 6.0-s interval at a rate of 0.040 rad/s2. What is its angular speed after this 6-s interval
A 3.00-k? resistor and a 2.00-?F capacitor are connected in series with an AC generator; What is the average power dissipation in this circuit
When the block just touches the spring, how much gravitational potential energy has it lost? Give your answer as a positive number. After the mass has fully compressed the spring, what is its total loss of gravitational potential energy? Give your an..
The amplitude of a lightly damped oscillator decreases by 2.8% during each cycle. What percentage of the mechanical energy of the oscillator is lost in each cycle?
What is the physics behind everyday sayings
A box slides across a frictionless floor with an initial speed v = 4.9 m/s. It encounters a rough region where the coefficient of friction is uk = 0.3. What is the shortest length of rough floor which will stop the box
Mark and Clark are identical twins at the amusement park riding on the bumper cars. Both boys have the same mass, 85kg. The cars are identical with a mass of 120 kg.
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