Frank and lisa are analyzing the chart, which shows the speed at which light travels through different media. frank says that light travels through diamond with the greatest frequency. lisa says that light travels through air with the greatest frequency. which best describes the accuracy of these statements? a. frank is correct because light travels through diamond at the slowest speed, and speed and frequency have an inverse relationship. b. lisa is correct because light travels through air at the fastest speed, and speed and frequency have a direct relationship. c. neither person is correct because light does not change frequency when it travels through different media. d. both people are correct because light has both an inverse and a direct relationship with frequency, depending on the media.

Which feature indicates that mars resides in the inner region of the solar system

In a thunderstorm, charge builds up on the water droplets or ice crystals in a cloud. thus, the charge can be considered to be distributed uniformly throughout the cloud. for the purposes of this problem, take the cloud to be a sphere of diameter 1.00 kilometer. the point of this problem is to estimate the maximum amount of charge that this cloud can contain, assuming that the charge builds up until the electric field at the surface of the cloud reaches the value at which the surrounding air breaks down. this breakdown means that the air becomes highly ionized, enabling it to conduct the charge from the cloud to the ground or another nearby cloud. the ionized air will then emit light due to the recombination of the electrons and atoms to form excited molecules that radiate light. in addition, the large current will heat up the air, resulting in its rapid expansion. these two phenomena account for the appearance of lightning and the sound of thunder. take the breakdown electric field of air to be eb=3.00ă—106n/c. part a estimate the total charge q on the cloud when the breakdown of the surrounding air is reached. express your answer numerically, to three significant figures, using ďµ0=8.85ă—10â’12c2/(nâ‹…m2) .

The electric field direction is defined by the direction of the force felt by (select one of the following answers): 1. a negative charge. 2. a positive charge. 3. both positive and negative charges.