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The lowest temperature that has been achieved is about 1 × 10-6 K. To achieve this an additional stage of cooling is required beyond that described in the previous problem, namely nuclear cooling. This process is similar to magnetic cooling, but it involves the magnetic moment associated with the nucleus rather than that associated with certain ions in the paramagnetic salt. Suppose that 10 µJ is to be removed from a specimen at an average temperature of 10-5 K (ten microjoules is about the potential energy loss of a pin dropping 3 mm). Find the work input to a Carnot heat pump and its coefficient of performance to do this assuming the ambient is at 300 K.
based on observations the speed of a jogger can be approximated problems 617 by the relation v 5 7.51 2 0.04x0.3 where
a 100-pound sign is supported at the midpoint of a cable stretched between anchor points that are separated by 86 feet.
During the process, the pressure and specific volume are related by pv = constant. For the refrigerant, determine the work and heat transfer per unit mass, each in KJ/kg.
What is the magnitude of the friction force between the ramp and the cylindrical disk?
a gate is 0.5 m wide and 0.6 m tall and is hinged at the bottom. on one side the gate holds back a 0.5 m deep body of
an automobile is found to have a natural frequency of 20 rads without passengers and 17.32 rads with passengers of mass
what is the type of analog anti aliasing filter in DSA HP3566a? is that butterworth, chebyshev, inverse chebyshev or elliptic? and what order of that filter? thanks very much.
a coil of 12 ohms is connected in parallel with another of 20 u ohms resistance the circuit is then connected in series
sixteen kg of air and two kg of helium gas are sealed in a rigid and insulated internal-piston-cylinder device.
a study is to be made using liquid ammonia as the fuel in a gas-turbine engine. consider the compression and combustion
a synchronous orbit about the earth is obtained when the period of the orbit is same as the length of the day. if the
a solid circular bar of aluminium fits inside a tube of copper with outside diameter of 50mm amp 45mm as inside
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