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A 3.1 kg block of copper at a temperature of 72 C is dropped into a bucket containing a mixture of ice and water whose total mass is 1.2 kg. When thermal equilibrium is reached the temperature of the water is 8 C. How much ice was in the bucket before the copper block was placed in it? (Neglect the heat capacity of the bucket.)
You are given 65.000 cm of copper wire with diameter 7.0000 mm. compute At what rate is thermal energy generated in the loop
A 50 kg woman stands on the back of a 6 m long, 125 kg raft that is floating at rest in still water with no friction. The raft is 0.50 m from a fixed pier.
A 4m long, 140g rope is fixed at one end while the other is tied to a light string. what is the frequency of the third harmonic
light of wavelength 550 nm of air is found to travel at 1.96 x 10^8 m/s in a certain liquid. what is the frequency of the light in air
A hot-air balloon has just lifted off and is rising at the constant rate of 2.2 m/s. how high is she when the camera reaches her
Four particles, one at each of the four corners of a square with 3m-long edges, are connected by massless rods. The masses of the particles are m1 = m3 = 4kg and m2 = m4 = 5kg. Determine the moment of inertia of the system about the z axis.
A positive charge of 0.800? C is located in a uniform field of 1.20×105 N/C. A negative charge of -0.400? C is brought near enough to the positive charge that the attractive force between the charges just equals the force on the positive charge du..
A gasoline engine absorbs 2,600 J of heat and performs 1,000 J of mechanical work in each cycle. Find the total of heat expelled in each cycle.
If the charge of the point charge in the figure were -2Q (instead of +Q), by what factor would the magnitude of the force on the point charge due to the dipole change.
A 10 nC point charge is at the center of a 2.0m x 2.0m x 2.0 mcube. What is the electric flux through the top surface of the cube
If friction and air resistance can be neglected, determine her speed vB when she reaches the horizontal end of the ramp at B.
a child on a swing set swing back and forth if the length of the supporting cables for the swing is 2.1 m long, what's acceleration does to gravity or oscillation
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