Q2) the radiation resistance of very small dipole of radius lambda/25, with an idealized uniform current distribution is? a-1ohm b- less than 1 ohm c- the same as the dipole 73 ohm d- greater than 1 ohm

2. The permittivity of the Earth's ionosphere can be described by an unmagnetized cold plasma model: Ne² 8(0) = 6,1-1,0² = ² If N-10¹2 electrons/m³, e-1.6 x10-¹9 Coulombs, m - 9.1x 10³1 kg, (a) What permittivity does an AM radio signal (f=1MHz) see? (b) What permittivity does an FM radio signal (f-100MHz) see? (c) From the numbers in (a) and (b), what do you think happens to an AM wave and an FM wave as they hit the ionosphere? Explain. X

Which intermolecular force does not require a permanent dipole? a) dipole-dipole forces b) ion-dipole attractions c) hydrogen bonding d) London dispersion forces

See attached image. part a and b are not dependent on each other.