A group of wealthy and concerned citizens are concerned with large groups of people gathering in their town. They can hire a company named “Defense” or a company named “Shield” to patrol the town with this microwave producing machine on the larger Hummers defenses microwave produces waves with a frequency of 300×10^8 Hz, and Shields microwaves are produced the frequency of 800×10^8 Hz. Which is better and why?

two charges are fixed in place on the x-axis as shown. the charge at x = 0 is negative and has magnitude q = 2 μcoulombs (1 μcoulomb = 10-6 coulombs). the charge at x = d, (d = +12 cm), is positive and has magnitude q = 4 μcoulombs. find a point x = xo along the x-axis at which the electric field is zero.

the temperature in kelvin of 2.0 dm3 of an ideal gas is doubled and its pressure is increased by a factor of four. what is the final volume of the gas