31) The basic concept of how a simple motor works is explained by which statement?

A) When a fan blows on a wire, it causes it to spin creating a force.

B) When a fan blows on a wire, it causes it to spin, creating an electrical current.

C) When a wire that carries electrical current is placed in zero gravity, the wire experiences a force.

D) When a wire that carries electrical current is placed in a magnetic field, the wire experiences a force

The image shows a pendulum in simple harmonic motion the pendulum starts at a and swing to e

Air initially at 0.75 bar, 1000 k, and occupying a volume of 0.12 m^3 undergoes two processes. process 1-2: the air is compressed isothermally until the volume is halved. process 2-3: the air undergoes a constant pressure process until the volume is halved again. assume ideal gas behavior. a) determine the mass of the air, in kg. b) the work and the heat transfer for each of the two processes, in kj. (100 kj = 1 bar . m^3)

An ice-making machine inside a refrigerator operates in a carnot cycle. it takes heat from liquid water at 0.0 degrees celsius and rejects heat to a room at a temperature of 19.2 degrees celsius. suppose that liquid water with a mass of 76.3kg at 0.0 degrees celsius is converted to ice at the same temperature. take the heat of fusion for water to be l_f = 3.34*10^5 j/kg.how much energy e must be supplied to the device? express your answer in joules.