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A 2kg block of ice initially at T = -20?C is put in contact with a very large amount of liquid water at T = 0?C (by "very large amount" we imply that by the time ice and water reach thermal equilibrium, there will still be some liquid water left). Ice and water can exchange heat just with each other but not with the environment. The specific heat of water is 4186 J and of ice is 2050 J . kg·K kg·K
(a) What is the final equilibrium temperature of the system?
(b) Draw a complete energy system diagram for the process, clearly showing all the indicators for initial and final state.
(c) Find the amount of heat absorbed by the ice in the process.
(d) Find the final mass of ice in the system at equilibrium.
(e) Find the the change in entropy of the 2kg-block of ice.
(f) Find the the change in entropy of the very large amount of water.
A horizontal force of magnitude 36.4N pushes a block of mass 3.81 kg across a floor where thecoefficient of kinetic friction is 0.640. find the increase in the kinetic energy of the block
a particle is moving along a straight line with the acceleration a 12t-3t12fts2 where t is in seconds.determine the
A landing craft with mass 1.26×104 is in a circular orbit a distance 5.90×105 above the surface of a planet. The period of the orbit is 5600. The astronauts in the lander measure the diameter of the planet to be 9.80×106.
As we've seen, astronauts measure their mass by measuring the period of oscillation when sitting in a chair connected to a spring. What is the mass of an astronaut who oscillates with a period of 2.16 when sitting in the chair
a motor scooter trsvels east at a speed of 12 m/s. The driverthen reserves direction and heads west at 15 m/s. What is the change in velocity of the scooter? (answer in magnitude anddirection)
a 1.5 cm diameter suction cup is pressed to the ceiling. a 51kg weight hangs from the center of the cup by string neglect the mass of the suction cup and string. find the normal force on the suction cup
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It is proposed that future space stations create an artificial gravity by rotating. Suppose a space station is constructed as a 800-m -diameter cylinder that rotates about its axis. The inside surface is the deck of the space station.
If the earth had no atmosphere and were a perfectly smooth sphere of radius 6.38 x 10^6 meter and mass 5.98 x 10^24 kilogram, find what would be the greatest orbital speed that a satellite could have
Derive the 5 volt reference from a 5 volt source. Apply a 1 KHz sine wave. Vary the amplitude of the input voltage and sketch the input and output waveforms.
Charges of 3.0 nC, -2.0 nC, -7.0 nC, and 1.0 nC are contained inside a rectangular box with length 1.0 m, width 2.0 m, and height 2.5 m. obtain the electric flux through the surface of the box
A car travelling 92 {rm km/h} is 150 {rm m} behind a truck travelling 80 {rm km/h}. How long will it take the car to catch the truck.
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