Find the magnetic field at point p on the axis of a tightly wound solenoid (helical coil) consisting of n turns per unit length wrapped around a cylindrical tube of radius a and carrying current i (fig. 5.25). express your answer in terms of θ1 and θ2 (it’s easiest that way). consider the turns to be essentially circular, and use the result of ex. 5.6. what is the field on the axis of an infinite solenoid (infinite in both directions)

explanation:

earth's surface is mainly heated by the absorption of infrared radiation from the sun.

evaporation occurs because molecules in liquid water are warmed ( usually by the sun) and vibrate quicker, becoming less dense and rise.

condensation occurs because molecules in water vapor are cooled and therefore vibrate more slowly thus becoming more dense and eventually fall to earth.

lines of equal barometric pressure on a weather map are called: isobars : lines of equal temp on a weather map are called: isotherms.​