Like the charged rubber balloon described at the end of section 1.14, a charged soap bubble experiences an outward electrical force on every bit of its surface. given the total charge q on a bubble of radius r, what is the magnitude of the resultant force tending to pull any hemispherical half of the bubble away from the other half? (should this force divided by 2πr exceed the surface tension of the soap film, interesting behavior might be expected! )

What is the order of the moon, earth, and sun in a lunar eclipse and a solar eclipse?

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 respiratory system removes oxygen and water from the body. select the best answer from the choices provided t f