Ethanethiol (c2h5sh; also called ethyl mercaptan) is com- monly added to natural gas to provide the ""rotten egg"" smell of a gas leak. the boiling point of ethanethiol is 358c and its heat of vaporization is 27.5 kj/mol. what is the entropy of vaporization for this substance?

Acave rescue team lifts an injured spelunker directly upward and out of a sinkhole by means of a motor-driven cable. the lift is performed in three stages, each requiring a vertical distance of 10.0 m: (a) the initially stationary spelunker is accelerated to a speed of 4.90 m/s; (b) he is then lifted at the constant speed of 4.90 m/s; (c) finally he is decelerated to zero speed. how much work is done on the 68.0 kg rescue by the force lifting him during each stage?

Why is it important always to use horizontal bars in unit fractions when performing unit conversions?

Electromagnetic induction. a coil of wire contains n turns and has an electrical resistance r. the radius of each turn is a. initially, inside the coil there exists a uniform magnetic field of magnitude b0 parallel to the axis of the coil. the magnetic field is then reduced slowly. the current induced in the coil is i. how long does it take for the magnitude of the uniform field to drop to zero?