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Two copper blocks, each of mass 1.00kg, initially have differenttemperatures, 20 degree celsius and 28 degree celsius. The blocksare placed in contact with each other and come to thermalequilibrium. No heat is lost to the surroundings.
a) Find the final temperature of the blocks and the heattransferred between them.
b) Find the entropy change of each block during the time interval inwhich the first joule of heat flows.
c) Estimate the entropy change of each block after it has reachedthermal equilibrium. Use each block's average temperature duringthe process in calculating the estimated values of Δ S.
An aircraft has a lift-off of 120km/h. (a) What minimum constant acceleration does the aircraft require if it is to be airborne after a takeoff run of 240m (b) How long does it take the aircraft to become airborne
A 157g ball is tied to a string. It is pulled to an angle of 8.00 degrees and released to swing as a pendulum. How long is the string
A laboratory technician drops a 0.0840-kg sample of unknown material, at a temperature of 100.0°C, into a calorimeter. Compute the specific heat capacity of the sample
A 65.0 kg bungee jumper steps off abridge with a light bungee cord tied to her and to the bridge. The unstretched length of the cord is 11.0m. She reaches the bottom of her motion 36.0 m below the bridge before bouncing back
Suppose Fuzzy, a quantum-mechanical duck, lives in a world in which h = 2?J · s. Fuzzy has a mass of 1.80 kg and is initially known to be within a pond 1.00 m wide. What is the minimum uncertainty in the duck's speed
When at rest, a proton experiences a net electromagnetic force that has a magnitude of 7.2 × 10-14 N and points in the positive x-direction. Find the magnitude and direction of the electric field
A very long, straight solenoid with a cross-sectional area of 6.15cm squared is wound with 50 turns of wire per centimeter, calculate the average induced emf in the secondary coil
The Earth orbits about the sun once every 365 days. The distance between the earth and the sun is 1.5x10^11 m. What is the average orbital velocity of the earth
A motorcyclist is traveling along a road. He sees another cyclist ahead and starts to accelerate for 5 seconds to pass him. What is the angular displacement of the wheels
A mass of 40.0 grams is attached to a vertical spring with a spring constant k = 20.0 N/m and lowered slowly until the spring stops stretching. How much does the spring stretch
A taut rope has a mass of 0.160 kg and a length of 3.40 m. What power must be supplied to the rope in order to generate sinusoidal waves having an amplitude of 0.120 m and a wavelength of 0.490 m and traveling with a speed of 31.5 m/s?
A 4900 kg lunar lander is in orbit 60 km above the surface of the moon. How much work must the thrusters do
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