Which best describes the motion of air particles when a transverse wave passes through them?

a.
the particles move both perpendicular and parallel to the direction of the wave.

b.
the particles follow the motion of the wave.

c.
the particles move perpendicular to the direction of the wave.

d.
the particles move together and apart parallel to the direction of the wave.

Along wire of diameter 1 mm is submerged in an oil bath of temperature ∞ 31°c. the wire has an electrical resistance per unit length of 0.01 ω/m. if a current of 103 a flows through the wire and the convection coefficient is 500 w/m2·k, what is the steady-state temperature of the wire? from the time the current is applied, how long does it take for the wire to reach a temperature that is within 1°c of the steady-state value? the properties of the wire are 8000 kg/m3, 500 j/kg·k, and 20 w/m·k.