One mole of h,0 is cooled from 25°c to 0°c and frozen. all the heat is delivered to a second mole of h, o initially at 25°c, heating it to 100°c. the refrigerating machine is operating at maximum theoretical efficiency (no entropy created) (a) how much work must be done by the refrigerator? (b) what fraction of the second mole is converted to steam at 100 c? (the heat capacity of water is 18 cal/mole degree: the heat of vaporization at 100°c is 9730 calmole; the heat of fusion at 0°c is 1438 cal/mole.)
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Physics, 22.06.2019 04:30
Ameter stick is pivoted at the 0.50-m line. a 3.0-kg object is hung from the 0.15-m line. where should a 5.0-kg object be hung to achieve equilibrium (the meter stick oriented horizontal and motionless)?
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Physics, 22.06.2019 05:30
Imagine that someone pushes one marble toward a motionless marble. would there still be action-reaction forces involved in the collision? how might the marbles’ motions be changed? ?
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The magnetic field inside a superconducting solenoid is 4.50 t. the solenoid has an inner diameter of 6.20 cm and a length of 26.0 cm. determine (a) the magnetic energy density in the field and (b) the energy stored in the magnetic field within the solenoid.
Answers: 2
One mole of h,0 is cooled from 25°c to 0°c and frozen. all the heat is delivered to a second mole of...
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